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Guide to Fixing PFN_LIST_CORRUPT Blue Screen

PFN_LIST_CORRUPT Blue Screen - What is it?

PFN_LIST_CORRUPT is a blue screen of death error code. It occurs when the PFN (Page Frame Number) list becomes corrupt. The Page Frame Number is basically used by your hard drive to determine your location of each one of your files on the disk.

This error may occur when starting up the program or while using it. Blue screen of death errors occurs without any warnings. The program disrupts all of a sudden and the computer screen turns blue.

Solution

Restoro box imageError Causes

PFN_LIST_CORRUPT Blue Screen error may occur due to multiple reasons. Some of the common reasons include:

  • Hardware problems
  • Device driver issues
  • Registry problems
  • Viral Infection

It is recommended to resolve the PFN_LIST_CORRUPT Blue Screen of Death error immediately without any delay virtually because this error can be quite fatal to your PC.

It can pose serious threats to your system like system freeze, crash, failure, and valuable data loss. Furthermore, if the error is related to viral infection, it can expose you to privacy issues, data breaches, and cybercrime too.

Further Information and Manual Repair

This is a critical PC error but easy to resolve. You don’t need any technical expertise to fix this error on your PC. Here are some quick and easy methods to resolve PFN_LIST_CORRUPT Blue Screen error:

Method 1: Install Compatible Device Drivers

Sometimes when new hardware is added to the PC, you need to install updated versions of the device drivers to ensure there are no incompatibility issues.

Incompatibility between the hardware and device drivers may generate PFN_LIST_CORRUPT Blue Screen of death error on your screen. To resolve, it is advisable to download and install the latest updated versions of the device drivers from the manufacturer’s website.

Method 2: Scan for Viruses

PFN_LIST_CORRUPT Blue Screen of Death error may occur due to viral infection too. Viruses and spyware enter your PC when you log on to unreliable websites and download programs from there or open phishing emails on your PC.

These viruses corrupt and damage programs and files resulting in such errors. To fix the issue, you need to install a powerful antivirus and ensure all kinds of viruses and spyware are detected and removed from your system.

Method 3: Clean and Restore the Registry

PFN_LIST_CORRUPT Blue Screen error indicates poor PC maintenance. When you don’t clean and remove unnecessary and obsolete files like junk files, bad registry keys, cookies, internet history, temporary files, and invalid entries from the registry, the registry overloads and gets damaged.

These files accumulate taking up a lot of disk space and also corrupt system files. If these files are not removed timely, it results in registry issues like a blue screen of death errors and run-time errors. To remove these files and clean the registry, you need to install a powerful registry cleaner.

Whether the underlying cause for PFN_LIST_CORRUPT Blue Screen of Death error on your PC is viral infection or registry issues, to resolve the BSOD error code in seconds download Restoro.

This is a cutting-edge and multi-functional PC fixer deployed with both an antivirus and a registry cleaner. Additional features include a system optimizer too. It is user-friendly and easy to operate. You can download it on all Windows versions without any hassle. It is safe and bug-free.

The registry cleaner feature scans and removes all unnecessary files, cleans and repairs the registry while the antivirus utility simultaneously removes all kinds of malicious software including spyware, viruses, Trojans, and malware.

Click here to download Restoro now and resolve the PFN_LIST_CORRUPT Blue Screen of Death error immediately!

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Fix UTCSVC high CPU and Disk usage in Windows
There is a lot of high resource utilization by any process that slows down a Windows operating system and one of the services that could cause such a thing is the utcsvc.exe process. This particular process at times can cause high CPU and disk usage. So if you are currently facing this problem, read on as this post will guide you on how you can resolve the problem. UTC which stands for Universal Telemetry Client is a software that runs a service named Diagnostic Tracking Service or DiagTrak. This service is used by Microsoft to collect customer feedback, analyze customer’s problems, and push resolution via updates in order to make the Windows 10 operating system better. This service is an executable file that could be translated to Service Host and even though the process does not usually cause problems, there are actually times when it does especially if it results in high resource utilization. In such cases, you might want to consider disabling it to fix its high CPU and disk usage.

According to Microsoft:

“We collect information about you, your devices, applications and networks, and your use of those devices, applications, and networks. Examples of data we collect include your name, email address, preferences, and interests; browsing, search and file history; phone call and SMS data; device configuration and sensor data; and application usage.”
There are several ways you can disable the utcsvc.exe process. You can disable it using the Service Manager, Registry Editor, and Group Policy Editor. For more details, refer to the instructions laid out below.

Option 1 – Disable the Connected User Experience & Telemetry Service via Service Manager

Note that this option is for standalone systems, so if you’re not using one, refer to the next given options below.
  • Tap the Win + R keys to open the Run dialog box.
  • Then type “services.msc” in the field and tap Enter or click OK to open the Services Manager.
  • From the given list of services, look for the Connected User Experience service. Once you found it, click on it and you’ll see its description which states:
“The Connected User Experiences and Telemetry service enables features that support in-application and connected user experiences. Additionally, this service manages the event-driven collection and transmission of diagnostic and usage information (used to improve the experience and quality of the Windows Platform) when the diagnostics and usage privacy option settings are enabled under Feedback and Diagnostics.”
  • Next, right-click on it and select Properties.
  • Now, change its Startup Type to Disabled and click on the Apply and OK buttons to save the changes made.

Option 2 – Disable the Connected User Experience & Telemetry Service via Registry Editor

  • Tap the Win + R keys to launch the Run utility and type “Regedit” in the field and click OK to open the Registry Editor.
  • Next, navigate to this registry path: HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsDataCollection
  • After that, right-click on the folder named “DataCollection” and select New > DWORD (32-bit) Value.
  • Now name the new value “AllowTelemetry” and make sure that its Value data is “0” and then click on OK to save the changes made.
  • Restart your computer.

Option 3 – Disable the Connected User Experience & Telemetry Service via Group Policy Editor

If you have to disable the service related to the Universal Telemetry Client for company-managed systems, then you can do that using the Group Policy Editor.
  • Tap the Win + R keys to open the Run utility and type “gpedit.msc” in the field and hit Enter to open the Group Policy Editor.
  • Next, navigate to this path: Computer Configuration > Administrative Templates > Windows Components> Data Collection and Preview Build
  • After that, double-click on Data Collection and Preview Build to open its settings.
  • From there, look for the “Allow Telemetry” item and double click on it to open its Properties.
  • Next, set the radio button to Disabled and then click on the Apply button to save the changes made.
  • Restart your computer.

Option 4 – Run the Hardware and Devices Troubleshooter or the Performance Troubleshooter

Hardware and Devices Troubleshooter:

  • The first thing you need to do is click on Start and then on the gear-like icon to pull up the window for Settings.
  • After opening Settings, look for the Update and Security option and select it.
  • From there, go to the Troubleshoot option located on the left-hand side of the list.
  • Next, select Hardware and Devices from the list and open the Troubleshooter and run it. Once it is doing its job, wait for it to complete the process and then restart the system.
  • After the system restarts, check if the problem’s now fixed. If not, refer to the next option given below.

Performance Troubleshooter:

  • Tap the Win + R keys to open the Run dialog box.
  • Type “exe /id PerformanceDiagnostic” in the field and hit Enter to open the Performance troubleshooter.
  • Then click on Next to get started. Wait until the process is completed.
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nslookup works but ping fails in Windows
nslookup is a command-line tool that helps in finding the DNS records of a website. It sends a name server query to the DNS and obtains the corresponding IP address. Aside from that, it can also perform some complex functionality such as finding details about FTP server, Mail server and many more but most of them are used by administrators. The best thing about nslookup is that it queries the DNS server directly and it does not rely on the cache. On the other hand, there is another tool called PING that is used to verify connectivity. PING sends a packet of information to the IP address or Domain and gets back a response in the form of packets. So if everything goes well, all packets are received but if not, it will help you find out where the delay in the network exactly is. However, the ping command does not always attempt a DNS lookup which means that it might be using the DNS cache and use the IP address available in that table. Although both nslookup and PING help you in identifying the host or IP address, however, they don’t always work and sometimes fail. So if your nslookup works but ping fails on your Windows 10 PC when querying the IP address of a website then it could be caused by many reasons. It could be that the nslookup queries work for you but when you try to use PING, it fails. For instance, if you open the abc.com website, here’s how it will look like:
nslookup xyz.com Server: dns.company.com Address: 192.168.1.38 C:> ping xyz.com Ping request could not find host xyz.com. Please check the name and try again.
The domain is converted into an IP address and then data is sent to that IP address when you use PING. So when a reply comes back it means that the data is going back and forth to that domain without any problem. However, if the DNS fails to resolve the IP address of the website or if your PC does not attempt a DNS lookup, you will receive a similar error message that says, “Could not find host” and so on. To resolve this issue, here are some options that might help.

Option 1 – Reset Winsock, TCP/IP & Flush DNS

Resetting Winsock, TCP/IP, and flushing DNS might help you resolve the issue with nslookup and PING. To do so, follow these steps:
  • Right-click on the Start button and click on Command Prompt (administrator) so you can pull up an elevated Command Prompt.
  • After that, execute each one of the commands listed below. And after you typed in one after the other, you have to hit Enter.
  1. netsh winsock reset – type in this command to reset Winsock
  2. netsh int ip reset resettcpip.txt – type in this command to reset TCP/IP
  3. ipconfig /flushdns – type in this command to flush the DNS cache
  • Next, restart your PC and check if the problem’s fixed.

Option 2 – Force Windows to do a DNS lookup using FQDN

  • Go to Settings > Network & Internet > Status > Change adapter options.
  • From there, right-click on the network and select Properties.
  • Next, in case you’re using IPv6, from the list of connections available in the list, select Internet Protocol Version 4.
  • Then click on Properties and click Advanced.
  • After that, switch to the DNS tab and select “Append these DNS suffixes (in order)” and click on the Add button and then add “.” as a suffix so that each time you query using PING and another tool, it will add a “.” at the end and will force the lookup.

Option 3 – Make sure that there is only one default gateway

If your computer has more than one NIC connected and there are multiple default gateways, then it will most likely create confusion which is why you need to remove the default gateway from the configuration of all NICs and make sure that there is only one default gateway.

Option 4 – Use the Google Public DNS

You might want to change your DNS to Google Public DNS as it could also help you in fixing the nslookup and PING issues. To do so, follow the steps below.
  • The first thing you have to do is right-click on the network icon in the Taskbar and select Network and Sharing Center.
  • Next, click on the “Change Adapter Settings” option.
  • After that, search for the network connection that you are using to connect to the internet. Note that the option might be “Wireless Connection” or “Local Area Connection”.
  • Right-click on your network connection and click on Properties.
  • Then select the new window to choose the “Internet Protocol 4 (TCP/IPv4)” option.
  • After that, click on the Properties button and click the checkbox in the new window for the option “Use the following DNS server addresses”.
  • Type in “8.8.8.8” and “8.8.4.4” and click OK and exit.

Option 5 – Check the Windows Host file

You can also try to cross-check the Windows Hosts file to find out if the website you are trying to open has been blocked, because if it is, then it’s no wonder why PING fails even when nslookup works. There are instances when some third-party application modifies the file and adds some websites to the blocklists. So if the website is indeed blocked, you need to remove it from the list.

Option 6 – Delete the WLAN Profiles

Deleting the WLAN Profiles might be a good idea if you are not able to connect to the internet on your computer and if you’re using Wi-Fi. It could be that the networks that were connected previously have gone rogue which is why it is not connecting properly. And so deleting the WLAN profiles might help you in fixing the issue with nslookup and PING.

Option 7 – Reinstall the Network Adapter Drivers

  • Tap the Win + R keys to launch the Run window and then type in the “msc” command and hit Enter to open the Device Manager window.
  • Under the Device Manager, you will see a list of drivers. From there, look for the Network Adapters and expand it.
  • Then right-click on each one of the Network drivers and select “Uninstall device”.
  • Restart your PC.
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Personalize Windows 11 Start menu
Windows 11 is released and its adoption goes slower than Microsoft would like but nevertheless, it is slowly getting adopted, especially among new computers. Windows 11 has brought us a new modern look of OS but if you would like to personalize it a little more you can. Follow the guide on various things that you can change inside Windows 11.

windows 11 desktop iconsPersonalize list of recently added apps, opened items, folders

The recommended section that shows recently added apps and recently open items can be turned off and hidden now to be shown. In order to do this follow these steps:
  1. Open Windows Settings by pressing WINDOWS + I
  2. Click on personalization in the sidebar
  3. Click on START and go through the options
  4. Turn OFF switch beside recently accessed files
  5. Additionally, you can also change which folders appear on the Start menu.

Remove apps or change app order on the Start Menu

To remove application not to be shown in the Start menu at all follow this simple guide:
  1. Right-click on app
  2. Choose unpin
  3. To place the application on Start click on All Apps, right-click on the app and choose Pin to Start
  4. To drag and rearrange apps, simply click on them and drag them to the new place.

Change the Start Menu location

When Windows 11 was first released Start Menu could only be located in the middle of the screen but thanks to plenty of backlash from users now it is possible to move it on a more traditional left side.
  1. Press WINDOWS + I to open the settings app
  2. Click on Personalization
  3. Look for taskbar behaviors
  4. Inside taskbar behaviors look for Taskbar alignment
  5. Change alignment to left

Change the Start Menu color

In order to change the color of the Start Menu follow the next steps:
  1. Open Settings app
  2. Go to personalization settings
  3. Go to Colors
  4. Switch to custom
  5. Under accent color pick a color you like or make your custom one.
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Fixing the We can’t find a USB flash drive
One of the preferred ways to upgrade Windows 10 is by creating a bootable USB drive. However, you might change your mind when you encounter an error during the Windows 10 Setup that says, “We can’t find a USB flash drive”. Worry not for this error can be fixed using some suggestions that will be provided in this post. The funning thing about this error in Windows setup is that the computer says it’s not there when it’s clearly there. To fix this problem, you need to check if the USB device is accessible on your computer or you can also try a different USB device. In addition, you could check if there are any issues with both the USB 3.0 and USB 2.0 ports as it could be the reason why you’re getting the error or fix the bad sectors in the USB drive as well as see if the USB drive is set as the primary drive.

Option 1 – Try to check if the USB is accessible on your PC

The first thing you can do to resolve the problem is to check if you can access your USB device from your computer. All you have to do is open File Explorer and check if the USB device is listed there or not.

Option 2 – Try to connect a different USB device

The next thing you can do to fix the error is to try connecting a different USB device, specifically the one that has more significant storage space. You also have to make sure that it’s working on a different PC.

Option 3 – Fix any issues with the USB 3.0 and 2.0 ports

Although the USB 3.0 ports are compatible with the USB 2.0 ports, it does not necessarily mean that there wouldn’t be any problem when you use them which is why it’s best to fix any issues in them or better yet, use a compatible drive.

Option 4 – Try to fix the bad sectors in the USB drive via CHKDSK

When it comes to some issues concerning the hard drive or removable devices, there is a utility in Windows that might help which is called “chkdsk”. To use it, follow the steps below.
  • Tap the Win + S keys to open the Search box.
  • Then type “command prompt” in the field and from the search results that appear, right-click on Command Prompt and select “Run as administrator”.
  • After opening an elevated command prompt, copy and paste the following command and hit Enter:
CHKDSK [volume [[path] filename]] [/F] [/V] [/R] [/X] [/C] [: size]]
Note: In the command given above, “[/F]” will try to fix the system errors while “[/R]” will be the one to fix the bad sectors.
  • Now if you are prompted to run CHKDSK after your reboot your PC, just tap Y and reboot your PC.
  • If CHKDSK is not able to find any errors, tap the Win + E keys and navigate the access window. From there, right-click on the concerned drive and click on Properties.
  • After opening Properties, click on the tab Tools and then click on the “Check” button under the Error-checking section.
  • Wait until the process is completed and then restart your computer.

Option 5 – Try checking if the USB is set as the primary drive

You might also want to check if the USB drive is set as the primary drive because if it is, then it won’t appear on the list. It could also be that the USB drive has a primary disk in it. To undo it, you need to use the DISKPART utility.
  • In the Start Search, type “command prompt” and right-click on Command Prompt from the search results, and then select the “Run as administrator” option.
  • Next, execute the “diskpart” command to initiate the DISKPART utility.
  • After that, type the “list disk” command and tap Enter to display the list of disks on the computer. You have to take note of the drive number or letter of the concerned USB drive.
  • Once done, type the “select disk <X>” command where X is the drive letter or number and tap Enter.
  • Then execute the “list partition” command to see the list of all the partitions in your computer. It should be listed as 0, 1, or 2. 0 is the primary partition.
  • Now type the “select partition 0” command and tap Enter and then type “delete partition” to delete the selected partition.
  • You can do the same to the other partitions as well and when you’re done, execute the format command to turn the USB drive into a standard one.
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Samsung Odyssey Neo G9 monitor review
samsung Odyssey Neo G9Odyssey Neo G9 is a successor to Odyssey G9 curved gaming monitor and it is aimed again at the gaming community with its specifications but of course, it can be used for work as well. Gapping at a stunning $2500 USD price it is not really a cheap piece of hardware so it is normal to see what do you get for this kind of price and do features justify it, so let’s dive in.

Size and resolution

The first thing that you can notice about the screen is that it is big and curved, 49 inches big which is pretty big, and with it, I believe you can forget about using 2 or 3 screens because this single one will cover everything you need really. Going as far as 5120 X 1440 resolution is the strange definition, basically, this is 5K which is kind of nice but I do not see the advantage. Sure it is larger than 4K, but for the price of $2500 I expected an 8K monstrosity so if the resolution is not the main price justification then what is? Let’s move on and find out.

Odyssey tech specs

The monitor comes with HDR and 240Hz refresh rate which is very nice and coupled with 1ms pixel response time, adaptive sync, and Variable Refresh Rate you get pretty good other tech specs. All of this is very nice but the monitor's strongest selling point is Mini Led tech. Mini Led is a next-gen tech currently found only in high-end TVs. With this technology, monitors can produce truer blacks sort of speak thanks to a greater number of dimming zones. Odyssey Neo G9 is rated at 2000 nits in the brightness values and local dimming zones go to stunning 2048. It comes also with Quantum HDR that supports 10+, Freesync, and G-Sync capability. In connection, the department monitor comes with a single display 1.4 port and two HDMI 2.1 ports. It also includes a headphone jack along with two USB 3.0 ports.

Conclusion

While the resolution of the monitor is nothing impressive for the given price, its size and the rest of the tech specs surely are. Now I will not lie, the price is still a little too high but if you could afford it easily I think you should.
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How to Resolve Error Code 0x800704c7 in Windows 8

Error Code 0x800704c7 – What is it?

Error code 0x800704c7 occurs when Windows users attempt but fail to update their system. It affects various Windows users including those using Windows 8 and 8.1. This error code has common symptoms such as the following:

  • Inability to upgrade your Windows operating system
  • Message box that includes error code 0x800704c7 message

Solution

Restoro box imageError Causes

Error code 0x800704c7 in Windows 8 often occurs due to a poorly maintained system. It can occur when system files become corrupted or missing. It may also occur when malware infects your system. To resolve this error code, Windows users will need to select at least one of the manual repair methods listed below and follow the instructions given.

Further Information and Manual Repair

Manual repair methods enable users to address the underlying issues causing error code 0x800704c7. These repair methods are not very technical. However, you may need to get help from an IT professional if you find them to be difficult or if your attempts to implement these instructions fail to fix the error code.

Method One: Scan Your System for Missing or Corrupt System Files

The System File Checker Tool (SFC) enables Windows users to check their system for missing or corrupt system files. This utility tool is present on all Windows 8 systems and even other versions of the Windows operating system. Run this tool by following the steps below:

  • Step one: Go to Start and type Command Prompt or CMD.
  • Step two: Run as Administrator
  • Step three: Type sfc /scannow.

After running these procedures, check if the error code has been resolved by reattempting to update your system. If you are unable to complete the process and the error message reoccurs, try the next manual repair method below.

Method two: Use Powerful Antimalware Tool

Various forms of malware, including viruses, can infect your system, causing error codes to occur or even more serious problems. That’s why you’ll need to ensure you have a powerful antimalware program installed on your device. Once this is present on your system, start scanning for viruses, worms, and Trojan horses so as to resolve error code 0x800704c7 in Windows 8.

If the issue causing error code 0x800704c7 on your device is a virus or worm, cleaning your system with a powerful antimalware program will successfully resolve the error code. However, if the error code remains unresolved after completing this manual repair method, proceed to the next method below.

Method three: Restore your System

System Restore is a simple method that users can implement to resolve error code 0x800704c7. This enables users to restore their system to a period of time in which their device was not affected by the error code. If done correctly, it can enable users to successfully complete the update process. Follow the steps below.

  • Step one: Click the Start button and type Control Panel in the search box
  • Step two: Select Control Panel, then Recovery
  • Step three: Select System Restore, then Next
  • Step four: Select a restore point before appeared on your Windows8 system
  • Step five: Select Next, then Finish

Method Four: Use an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 8 and other related issues when they do arise, download and install a powerful automated tool.
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10 Worst Computer Viruses in history
Computers viruses, worms, ransomware, etc. are kinds of malicious software that no user should take lightly. On several occasions, we have touched upon security steps that each user should take in order to protect its identity and data. Sadly sometimes even when all precautions are taken some malware can still slip through and wreak havoc. Today we are looking at some of the worst or the best, depending on your view that has indeed wreaked plenty of havoc.

viruses10 worst computer viruses in history

In the list of the 10 most famous computer viruses below, we show the costs, dates, reach, and other key facts. First a note about terms: we use the words “virus” and “worm” interchangeably because most readers search for them that way. But there’s a subtle difference that we explain after the list.

1. Mydoom – $38 billion

The worst computer virus outbreak in history, Mydoom caused estimated damage of $38 billion in 2004, but its inflation-adjusted cost is actually $52.2 billion. Also known as Novarg, this malware is technically a “worm,” spread by mass emailing. At one point, the Mydoom virus was responsible for 25% of all emails sent. Mydoom scraped addresses from infected machines, then sent copies of itself to those addresses. It also roped those infected machines into a web of computers called a botnet that performed distributed denial of service (DDoS) attacks. These attacks were intended to shut down a target website or server. Mydoom is still around today, generating 1% of all phishing emails. That’s no small feat considering the 3.4 billion phishing emails sent each day. By that figure, Mydoom has taken on a life of its own, infecting enough poorly-protected machines to send 1.2 billion copies of itself per year, 16 years after its creation. Though a $250,000 reward was offered, the developer of this dangerous computer worm was never caught. Wondering what makes the world’s most secure computers so safe? See the [email protected] guide: Upgrade to the World's Most Secure and Manageable PC

2. Sobig – $30 billion

The 2003 Sobig computer virus is actually another worm. It is second only to the Mydoom virus in its scope. The $30 billion figure is a worldwide total, including Canada, the U.K., the U.S., mainland Europe, and Asia. Several versions of the worm were released in quick succession, named Sobig.A through Sobig.F, with Sobig.F being the most damaging. This cybercriminal program masqueraded as legitimate computer software attached to emails. It disrupted ticketing at Air Canada and interfered with countless other businesses. Despite its widespread damage, the creator of the successful bug was never caught.

3. Klez – $19.8 billion

Klez is a close third on the list of the worst computer viruses ever created. With nearly $20 billion in estimated damages, it infected about 7.2% of all computers in 2001, or 7 million PCs. The Klez worm sent fake emails, spoofed recognized senders and, among other things, attempted to deactivate other viruses. As with other viruses and worms, Klez was released in several variants. It infected files, copied itself, and spread throughout each victim’s network. It hung around for years, with each version more destructive than the last. Windows has come a long way since most of the computer viruses on this list hit the web. Thankfully, built-in protection with Microsoft Defender is always on the watch.

4. ILOVEYOU – $15 billion

The year 2000’s ILOVEYOU virus worked by sending a bogus “love letter” that looked like a harmless text file. Like Mydoom, this attacker sent copies of itself to every email address in the infected machine’s contact list. Shortly after its May 4 release, it had spread to more than 10 million PCs. The virus was created by a college student in the Philippines named Onel de Guzman. Lacking funds, he wrote the virus to steal passwords so he could log into online services he wanted to use for free. He reportedly had no idea how far his creation would spread. This virus is also known as Loveletter. Need to up your remote work security game before there’s another entry on the list of most deadly computer viruses? See our guide: How to Work Remotely and Securely

5. WannaCry – $4 billion

The 2017 WannaCry computer virus is ransomware, a virus that takes over your computer (or cloud files) and holds them hostage. The WannaCry ransomware ripped through computers in 150 countries, causing massive productivity losses as businesses, hospitals, and government organizations that didn’t pay were forced to rebuild systems from scratch. The malware raged like wildfire through 200,000 computers worldwide. It stopped when a 22-year-old security researcher in the U.K. found a way to turn it off. Computers with out-of-date operating systems were hit especially hard. That’s why security experts always recommend updating your systems frequently.

Ransomware strikes again

In September 2020, one of the potentially largest computer virus attacks in medical history hit Universal Health Services. The U.S. hospital chain, which has more than 400 locations, was reportedly struck by damaging ransomware. The attack forced the cancellation of surgeries and made healthcare workers switch to paper records.

6. Zeus – $3 billion

The Zeus computer virus is an online theft tool that hit the web in 2007. A whitepaper by Unisys three years later estimated that it was behind 44% of all banking malware attacks. By then, it had breached 88% of all Fortune 500 companies, 2,500 organizations total, and 76,000 computers in 196 countries. The Zeus botnet was a group of programs that worked together to take over machines for a remote “bot master.” It originated in Eastern Europe and was used to transfer money to secret bank accounts. More than 100 members of the crime ring behind the virus, mostly in the U.S., were arrested in 2010. It’s not as prominent today, but some of the virus’ source code lives on in newer botnet viruses and worms. Zeus caused documented damage of $100 million. But the real cost in terms of lost productivity, removal, and undocumented theft is undoubtedly much higher. A $3 billion estimate, adjusted for inflation, puts this virus at a cost of $3.7 billion in today’s dollars.

7. Code Red – $2.4 billion

First observed in 2001, the Code Red computer virus was yet another worm that penetrated 975,000 hosts. It displayed the words “Hacked by Chinese!” across infected web pages, and it ran entirely in each machine’s memory. In most cases it left no trace in hard drives or other storage. Financial costs are pegged at $2.4 billion. The virus attacked websites of infected computers and delivered a distributed denial of service (DDoS) attack on the U.S. White House’s website, www.whitehouse.gov. In fact, the White House had to change its IP address to defend against Cod Red. Can your printer get a virus? See our cool infographic: The State of Printer Security

8. Slammer – $1.2 billion

The SQL Slammer worm cost an estimated $750 million across 200,000 computer users in 2003. This computer virus randomly selected IP addresses, exploiting vulnerabilities and sending itself on to other machines. It used these victim machines to launch a DDoS attack on several internet hosts, significantly slowing internet traffic. The Slammer worm hit banks in the U.S. and Canada especially hard, taking ATMs offline in many locations. Customers of Toronto’s Imperial Bank of Commerce found themselves unable to access funds. The attack reared its ugly head again in 2016, launching from IP addresses in Ukraine, China, and Mexico.

9. CryptoLocker – $665 million

Thankfully, ransomware attacks like the 2013 CryptoLocker virus have dipped since their 2017 peak. This malware attacked upwards of 250,000 machines by encrypting their files. It displayed a red ransom note informing users that “your important files encryption produced on this computer.” A payment window accompanied the note. The virus’ creators used a worm called the Gameover Zeus botnet to make and send copies of the CryptoLocker virus. According to a report by security firm Sophos, the average ransomware attack costs a business $133,000. If we estimate that CryptoLocker hit 5,000 companies, that would put its total cost at $665 million. Where will cybersecurity go next? See our guide: The Future of Cybersecurity

10. Sasser – $500 million

The Sasser worm was written by a 17-year-old German computer science student named Sven Jaschan. He was arrested at the age of 18 in 2004 after a $250,000 bounty was posted for the computer virus’ creator. A friend of Jaschan’s tipped authorities that the youth had penned not only the Sasser worm but also the damaging Netsky.AC attack. Jaschan was given a suspended sentence after it was found he was a minor when he wrote the malware. The Sasser worm crashed millions of PCs, and though some reports put damages at $18 billion, the relatively low infection rate suggests a more likely cost of $500 million. Other notable viruses The top 10 worst computer viruses above are just the ugly tip of a gargantuan digital iceberg. With a million new malware programs popping up every 3 years, we may miss the forest for a few outstanding trees. Here are just a few more viruses that have wreaked havoc over the years: Mimail: This worm tried to harvest data from infected machines to launch a string of DDoS attacks, but was relatively easy to remove. Yaha: Yet another worm with several variants, thought to be the result of a cyber-war between Pakistan and India. Swen: Written in C++, the Swen computer worm disguised itself to look like a 2003 OS update. Its financial cost has been pegged at $10.4 billion, but not reliably. Storm Worm: This worm showed up in 2007 and attacked millions of computers with an email about approaching bad weather. Tanatos/Bugbear: A 2002 keylogger virus that targeted financial institutions and spread to 150 countries. Sircam: A computer worm from 2001 that used counterfeit emails with the subject line, “I send you this file in order to have your advice.” Explorezip: This worm used fake emails to spread to every machine on thousands of local networks. Melissa: The most dangerous computer virus in 1999, Melissa sent copies of itself that looked like NSFW pics. The U.S. FBI estimated cleanup and repair costs at $80 million. Flashback: A Mac-only virus, Flashback infected over 600,000 Macs in 2012 and even infected Apple’s home base in Cupertino, Calif. In 2020, there’s now more malware on Macs than on PCs. Conficker: This 2009 virus still infects many legacy systems and could do significant damage if it ever activates. Stuxnet: This worm is reported to have destroyed Iranian nuclear centrifuges by sending damaging instructions.
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Fix Setup has failed Error in Windows
If you encounter the “Setup has failed to determine supported install choices” error when trying to downgrade or upgrade your Windows 10 computer, this signifies that there are some compatibility issues with the installation process and that Windows was not able to either downgrade or upgrade to another version. Usually, this error occurs when you are using the built-in options in Windows 10 upgrade or downgrade to another version of Windows. This option is mostly used as it keeps the user settings as well as data intact. Thus, you need to keep in mind a lot of parameters before you proceed with the installation because if there is any conflict in the process, you certainly won’t be able to downgrade or upgrade your Windows computer. To resolve the issue, here are some suggestions that might help.

Option 1 – Try running in Compatibility mode

This is the first thing you can try to resolve the issue instead of going right ahead on making a bootable device. So if you are downgrading Windows, you can try to run the installer in the compatibility mode for that specific Windows version.
  • Look for the setup file.
  • Once you find it, right-click on it and select Properties from the context menu.
  • After that, go to the Compatibility tab and mark the checkbox for “Run this program in compatibility mode for:” and from the drop-down list, select either Windows 7 or Windows 8.
  • You also have to check the “Run as administrator” option.
  • Now click the Apply button and then click OK to save the changes made and check if it has resolved the issue or not.

Option 2 – Option 2 – Try troubleshooting compatibility

This option is almost the same as the first one except it is an alternative way of fixing the “Setup has failed to determine supported install choices” error in case the first one didn’t work. In this option, you will troubleshoot the compatibility issue.
  • Look for the setup file.
  • Then right-click on it and select the “Troubleshoot compatibility” from the context menu.
  • After that, click on the “Try recommended setting” option. Once the process is done, the error message should be gone.

Option 3 – Try to use the setup file instead of an image

If you are running the Windows ISO image for the installation, you can try running the setup file instead. This is because when you try to install Windows from an image file directly, it has to be loaded into a virtual CD drive first, and then from there, further operations are carried out. And so, you can just bypass this mechanism to avoid getting the “Setup has failed to determine supported install choices” error.
  • First, you need to extract the disk file to an accessible location.
  • After that, go to Sources > Setup.exe.
  • Now run the setup file to upgrade or downgrade the Windows version. Just make sure that you do run the setup file as an administrator.

Option 4 – Try to do the upgrade or downgrade in a Clean Boot state

Putting your PC in a Clean Boot state can also help when you want to upgrade or downgrade your version of Windows without any trouble because, during this state, you can start the system with a minimum number of drivers and startup programs that will surely help you in isolating the root cause of the issue.
  • Log onto your PC as an administrator.
  • Type in MSConfig in the Start Search to open the System Configuration utility.
  • From there, go to the General tab and click “Selective startup”.
  • Clear the “Load Startup items” checkbox and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
  • Next, click the Services tab and select the “Hide All Microsoft Services” checkbox.
  • Click Disable all.
  • Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
  • After that, try to install the Windows Updates or upgrade again.

Option 5 – Try to use the Media Creation tool

The Media Creation tool in Windows allows you to use the ISO installation file to make a bootable device that you can use to install Windows on your PC. Note that this is kind of different from the usual installation process as it could erase your computer’s current settings and data on the primary drive. Thus, before you proceed, you need to backup all your data into some removable drive and then use the Media Creation Tool to make a bootable drive.
  • After making the bootable drive, you need to plug it into your computer and then reboot.
  • Next, tap the F10 or Esc key to open the boot options.
  • Now set the boot priority of the removable drive the highest. Once the setup comes forth, follow the next onscreen instructions and install Windows without any problems.
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Happy New Year from ErrorTools.com!!!
As we are on the last day of 2021, our team here at errortools.com would like to express their great gratitude to you all for being with us all this time and would also want to wish you error-free 2022!!! Thank you for being part of this community, we wish you all the best in the upcoming 2022 and hope that we will see you again From all members of errotools, HAPPY NEW YEAR!!! new year christmass tree
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Malware in Popular CCleaner

On September 18th, 2017, Cisco’s Talos announced that CCleaner, a popular utility with billions of worldwide users, had been compromised by hackers, and was used to unwittingly distribute hidden malware in its installer. Later in the day, Piriform, the publisher of CCleaner, confirmed the problem.

Undetected by all but 1 major antivirus including CCleaner’s own parent company, this occurred for over a month and impacted over 2.7 million users. Users of CCleaner v5.33.6162 and CCleaner Cloud v1.07.3191 for 32-bit Windows are affected. These downloads were live on CCleaner’s official site from August 15th to September 12th, 2017. Anyone who downloaded the program during this time could be affected. The company claims that while the hackers set up the backdoor and many users were impacted, that the perpetrators have been arrested and that the malware never successfully performed its full task and compromised user’s PCs or sent out their data; in the wake of recent security breaches such as Equifax, users are understandably worried. Given the severity of the threat of hacking and data theft, users should take action immediately if they have CCleaner.

Technical Details of CCleaner Malware Injection

First reported by Talos, the malware, which was hidden in the CCleaner installer without the publisher noticing (despite them being owned by Avast, a massive Anti-virus company), modified a core program DLL file to evade detection, and creates several registry keys. Not only were these files not flagged by any major Anti-Virus, but they were also even digitally signed by Piriform via their Symantec certificate, meaning your PC and security program would likely whitelist and trust the malicious installer. The malware gathers personal information on a user’s PC, including IP address and running programs, and sends it to a remote server. In our testing, the program sent data to IP 216.126.225.148.

Restore Your PC (If Possible)

As of the publication of this article, there have been no assurances given that updating or even uninstalling CCleaner will remove the malware is installed. The only action thus far has been shutting down the remote server where user data was being sent has been shut down by authorities. For this reason, it is best to remove the underlying malware separately, as its presence represents a serious security threat. Unfortunately, as this could have been installed as far back as August 15th, 2017, your System Restore points may not go back that far, or even if they do, restoring to such an outdated point may cause unintended problems with other programs you use and potentially lost files and data. Manually backing up files and doing a full format or clean Windows installation would likely be successful in fully removing the malware, but is extremely time-consuming and can be difficult for many PC users. Unfortunately, this makes a PC Restore or format an unattainable option for many.

Update CCleaner to the Latest Version

While CCleaner has told users to update to the latest version of the program. Prior to doing so, we recommend fully uninstall CCleaner, ensuring you check its program files folders and registry keys, manually deleting any remnants, and then re-downloading the latest version from the official site and reinstalling clean.
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