How to Fix Windows 10 Error 0x800488AB

Error Code 0xC1900101, 0x20017 – What is it?

Error code 0xC1900101, 0x20017 in Windows 10 occurs when Windows users attempt to upgrade to Windows 10 but fail to complete the installation process. This Windows error code may occur due to issues with a third-party antivirus program or problems related to a driver or hardware. When this occurs users will receive an error message and their machine will automatically revert to the original operating system on the device. Common symptoms of the error code include the following:

• Error code 0xC1900101-0x20017 message box
• Inability to complete Windows 10 upgrade

Solution

Error Causes

Like many other error codes affecting Windows 10 users, 0xC1900101-0x20017 may result due to several different reasons. Oftentimes, error code 0xC1900101 -0x20017 affects users who attempt to upgrade their operating system but have incompatible drivers or hardware as well as antivirus or other security systems which prevent the upgrade from occurring. If this error message is not resolved, it could give birth to other error messages such as error code 0x80070652. 

Further Information and Manual Repair

To fix this particular error code affecting Windows 10 devices, you will need to employ at least one manual repair method mentioned within this article. Manual repair methods offer effective solutions as they seek to address the root causes related to Windows error codes. When the manual repair methods are implemented correctly, users are usually able to quickly overcome issues that cause Windows error codes and can thereafter access all the benefits Windows has to offer to its users.

Note, however, that in a few cases where technical skills are required, the need for a Windows repair technician may present itself. In such a case, resort to Windows forums and other resources to access help from a certified Windows professional. Also, consider using an automated tool where necessary.

Method One: Temporarily Disable or Uninstall Third-party Security Software

Some third-party security programs or antivirus software may interfere with the installation process when Windows users attempt to upgrade to Windows 10. To verify if this is the issue causing error code 0xC1900101-0x20017 on your device, temporarily uninstall or disable these applications. You may easily do so by checking the settings of these programs or visiting Settings within the Windows Start Menu.

Once you have disabled these programs on your device, reboot your machine and attempt to update to Windows 10. If the issue was caused by a third-party app, error code 0xC1900101-0x20017 will no longer occur and your machine will successfully upgrade to the version of Windows 10 you attempt to download.

However, in the case where error code 0xC1900101-0x20017 in Windows 10 reoccurs during the installation process, you will need to resort to another manual repair method listed below.

Method Two: Disable Firewall Software

Like method one, this manual repair method can be effective in combating issues related to 0xC1900101-0x20017. This is of course, dependent on whether or not the error code is due to an incompatible security program.

Temporarily disable your firewall by adjusting its settings. Once this step is complete, reboot your machine and attempt to install the latest version of Windows 10. If you are able to complete the process, this means the problem was due to an issue with your firewall. You can then enable the firewall you previously disabled or download another program as its replacement.

If the error code reoccurs, however, consider implementing the next manual repair method on this list.

Method Three: Use Command Prompt to Check for Damaged System Files

Command Prompt can be very effective in helping regular as well as technically skilled users repair issues with their PC. In the case of error code 0xC1900101-0x20017 in Windows 10, access Command Prompt using the following instructions.

• Step one: Right-click Start Menu
• Step two: Select Command Prompt (Admin)
• Step three: Type sfc /scannow

Be sure to enter the command as it is written above, with a space between “sfc” and “/scannow”. Wait until the scan is complete. If there are any errors related to system files, i.e. if any system files are damaged, corrupted, or missing, your machine will begin to fix it. Once the process is complete, reboot your PC then reattempt the Windows 10 upgrade process via Windows Update. If you are successful, it means that you have rectified error code 0xC1900101-0x20017. Otherwise, you may need to contact a Windows repair technician.

Method Four: Download an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 10 and other related issues when they do arise, download and install a powerful automated tool.

Fatal Error c000021a - What is it?

Fatal Error c000021a is a type of Windows stop error also known as the blue screen of death (BSoD) error. When this error occurs, it causes the computer screen to go blue and locks the user out of the current activity. This error code is fatal and can lead to serious issues like system crashes and freeze. The error code is usually displayed in the following format:

STOP: c000021a {Fatal System Error} The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0x00000000 0x0000000)

Solution

Error Causes

Fatal Error c000021a occurs when the Windows kernel detects that either Winlogon.exe or Csrss.exe service processes have stopped responding or failed to load.  When this happens the error code pops up on the screen. Nonetheless, this is not the only reason for the occurrence of this error. There are plenty more reasons why Fatal Error c000021a may pop on your computer screen. These include:

• Missing or corrupt hardware drivers
• Faulty hardware
• Windows System Restore failed during the rollback process
• Malware or viral infection
• Registry issues

No matter what the reason may be, it is advisable to fix the error right away without any delays. Remember it is a fatal error and can cause a great deal of damage to your PC.

Further Information and Manual Repair

Fatal Error c000021a is a serious PC issue but this does not mean you have to hire an expert to get it fixed. The good news is that this error is actually quite easy to resolve. You don’t have to be a technical whiz or a computer programmer to fix Fatal Error c000021a on your PC. Here are some do it yourself methods to fix this error code right away without any hassle: Let’s get started:

Method 1: Update Your PC Drivers

As we mentioned about corrupt or missing drivers can be one of the many reasons for the occurrence of this error. So, check the drivers first. Perform a driver scan and make sure all your drivers are updated.

Method 2: Perform a Windows System Restore

To do this, first launch Task Manager by pressing CTRL+SHIFT+ESC on your keyboard. Now click on the application tab and then click ‘New Task’ then browse. After that, go to C:\Windows\System32\Restore  folder and then double click the rstrui.exe file. This will help start system restoration. Your computer will reboot during the process and hopefully, the error will be resolved. Nonetheless, if the error still persists then try methods 3 and 4.

Method 3: Scan for Viruses

Sometimes Fatal Error c000021a may also occur due to malware infection. Your PC may be affected by viruses hidden in different locations without you knowing about it. Therefore to resolve this error, it is recommended to run an antivirus and scan for viruses. If detected, remove them right away to fix the error code.

Method 4: Repair the Registry

Another method to resolve Fatal Error c000021a code on your system is to repair the registry. The registry stores all the information and activities performed on the system. If it is not cleaned frequently, it gets loaded with too many files unnecessary and obsolete files like the junk files, cookies, internet history and temporary files which corrupts and damages the registry thereby generating blue screen of death error codes like Fatal Error c000021a. Though you can repair the registry manually it can be both time-consuming and slightly difficult especially if you are not a computer programmer. Therefore it is advisable to download a registry cleaner to fix it right away.

Automatic Repair with Restoro.

Whether the Fatal Error c000021a code occurs due to viral infection or registry issues, download Restoro. This is a next-generation, advanced, and multi-functional PC Fixer. This software is deployed with multiple utilities such as a powerful registry cleaner, an antivirus, a system optimizer, and more. The registry cleaner scans the entire PC and detects all types of registry issues at once. It cleans the registry, wipes out all the unnecessary files, and restores the registry back to normal. Simultaneously, the antivirus embedded in this software detects all types of viruses including malware, adware, spyware and Trojans and removes them in seconds. The system optimizer feature ensures the speed and performance of your PC are not compromised during the repairing process. It ensures your PC works at its optimal speed. Restoro is a one-stop solution for all your PC needs. It has a user-friendly interface making it easy for all levels of users to work around. It is compatible with all Windows versions Click here to download Restoro and resolve the Fatal Error c000021a code on your PC today!

A command is not recognized Error, what it is? If you are constantly using programs like CMD or DISM directly from the Run prompt, you might have wondered how they launched instantly and how is it that the Windows operating system is able to find them right away. For instance, when you create a shortcut of a program, the shortcut knows where exactly the program is located and launches it quickly. The Windows operating system keeps a list of paths where the most common system programs are located so when you use the Run prompt, it opens easily. The list kept by Windows is called the Windows Environment Variables. If something goes wrong with this list, the programs won’t work. So in this guide, you will be guided on how you can troubleshoot the problem where any command you use is not recognized as an internal or external command, operable program, or batch file. Before you start troubleshooting the problem, you need to make sure that the program you are trying to run really exists. In fact, this can also happen to the Run program which is pulled up using the Win + R shortcut. To check, go to C:\Windows\System32 and there, check if the program exists or not or you can also try searching for the EXE in the System 32 folder. After making sure that the program exists, refer to the instructions given below.

Modify the Windows Environment Variables:

• Step 1: Tap the Win + X keys and then select System. After that, it will open the section where you can see all the properties on your computer.
• Step 2: Next, select the Advanced system setting located on the left pane and click on the Environment Variables.
• Step 3: After that, locate Path under the System Variables and select EDIT.
• Step 4: Before you edit, you need to copy the entire string and paste it into the Notepad app so that in case something went wrong, you can paste it back.
• Step 5: Next, look for the directory path, “C:\Windows\System32”. If you can’t find it, try adding a semi-colon at the end.
• Step 6: Afterwards, click OK to save the changes made and then exit.
• Step 7: Now restart your computer as all the paths are picked up when your computer restarts.

Note: Now all you have to do is to try executing the programs once again – the ones where you got the error, “ is not recognized as an internal or external command, operable program or batch file” every time you open them and then see if you can now open these programs or not.

From their infant stages to modern days, computer viruses were always kind of here. From simple ones that were annoying with playing speaker sounds and throwing messages on screen to more malicious ones capable of deleting and encrypting files. In today's modern world it is very important to protect yourself, modern viruses are not a joke anymore and they are aimed to create serious damage to computer systems. They can encrypt files in order to make you pay for a decrypter, they can straight up delete files or even cause some hardware damage. Like mentioned before protecting yourself is important, but protecting does not mean only having antivirus software installed, information, where are common places in which they lurk and could be picked up, is also very important. That is why we are exploring in this article the most common place where you can pick viruses or other malware.

Downloading Programs

Programs that contain the downloadable files are the commonest source of malware such as freeware, worms, and other executable files. Whether you download an image editing software, a music file, or an e-book, it is important to ensure the reliability of the source of the media. Unknown, new, or less popular sources should be avoided.

Pirated or Cracked Software

Are you aware of software cracking? Well, every time you open cracked software, your antivirus software might flag it as malware as the cracks consist of malicious scripts. Always say “No” to cracks as they can inject malicious script into your PC.

Email Attachments

Anyone can send you an email attachment whether you know them or not. Clicking on unknown links or attachments can harm your device. Think twice before clicking anything and make sure that file type is not ‘.exe’.

Internet

One of the easiest ways to get a virus on your device is through the Internet. Make sure to check the URL before accessing any website. For a secured URL always look for ‘HTTPS in it. For example, when you click videos published on social media websites, they may require you to install a particular type of plug-in to watch that video. But in reality, these plug-ins might be malicious software that can steal your sensitive information.

Booting Data from Unknown CDs

Malicious software can get into your device through an unknown CD. A good practice to be safe from malicious infection is to remove CD when your device is not working at all. Your system could reboot the CD if it is not removed before switching off the computer.

Bluetooth

Bluetooth transfers can also infect your system, so it is crucial to know what type of media file is being sent to your computer whenever a transfer takes place. An effective armor would be to allow Bluetooth connectivity with only known devices and activate it only when required.

Unpatched Software

Often overlooked, unpatched software is also a leading source of virus infection. Security holes in software are exploited by attackers and are unknown to software makers until the attackers release them in the form of zero-day attacks. It is therefore recommended to install software updates as soon as they are available on your PC.

You might be familiar with the Encryption File System or EFS algorithm if you rather keep your files and folders encrypted. Encryption File System is a built-in feature in Windows 10 which allows users to secure their important files. Although there is an alternative way for you to secure your data on your Windows 10 computer, you can’t ignore the fact that the main advantage of an Encryption File System over BitLocker is that the former can help you encrypt a particular folder rather than encrypting the whole hard drive partition. If you move a file inside a folder encrypted with the Encrypting File System it will automatically get encrypted. There are some users who like this feature but unsurprisingly, there are some that don’t. So if whether you want your files encrypted when you place them in an encrypted folder or if you want to keep it as it is, read on as to how you can do it either way. You can enable or disable automatic encryption of files moved to encrypted folders in Windows 10 using the Registry Editor or the Group Policy Editor. Before you proceed, make sure to create a System Restore Point first because the modifications you’re about to make in your computer might affect its overall functioning so if anything goes wrong, you can always undo the changes. Once you have that covered, refer to the options given below to enable or disable automatic encryption in Windows 10.

Option 1 – Enable or disable automatic encryption using Registry Editor

• Press the Win key + R key at the same time to open the Run dialog box.
• Then type “Regedit” in the field and press Enter to open the Registry Editor and if a User Account Control or UAC prompt appears, just click Yes to proceed.
• After opening the Registry Editor, navigate to this key location: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesExplorer
• Next, right-click on Explorer and select New > DWORD (32-bit) Value and then name the newly create DWORD to “NoEncryptOnMove” and press Enter to save it.
• After that, double click on the NoEncryptOnMove DWORD and set its value to the following preferences:
  • 1 – Disable Auto Encryption of files moved to encrypted folders.
  • 0 – Enable Auto Encryption of files moved to encrypted folders.

• Now close the Registry Editor and restart your computer to successfully apply the changes made.

Option 2 – Enable or disable automatic encryption using the Group Policy Editor

• Press the Win + R keys to open the Run box and type “gpedit.msc” in the field and press Enter to open the Group Policy Editor.
• After that, navigate to this path: Computer ConfigurationAdministrative TemplatesSystem
• Next, look for the “Do not automatically encrypt files moved to encrypted folders” option and double click on it to set the policy. From there, you will see the following description:

“This policy setting prevents File Explorer from encrypting files that are moved to an encrypted folder. If you enable this policy setting, File Explorer will not automatically encrypt files that are moved to an encrypted folder. If you disable or do not configure this policy setting, File Explorer automatically encrypts files that are moved to an encrypted folder. This setting applies only to files moved within a volume. When files are moved to other volumes, or if you create a new file in an encrypted folder, File Explorer encrypts those files automatically.”

• Now select one of the radio buttons below depending on your preference:
  • Not Configured or Disabled: Enable Auto Encrypt of files moved to EFS Encrypted folders.
  • Enabled: Disable Auto Encrypt of files moved to EFS Encrypted folders.
• Then click on the Apply and OK buttons to save the changes made.
• Exit the Group Policy Editor and restart your computer.

Error Code 0x80073b01 - What is it?

The 0x80073b01 is an error message that often pops up on the screen when you run Windows Defender. Windows Defender is an antispyware by Microsoft integrated into Windows Vista and Windows 7. The error code 0x80073b01 is considered to be a critical Windows error which must be fixed immediately. This error code locks you out of Windows Defender thus putting your computer at risk potential security loopholes in the Windows environment such as notorious software like spyware, adware, and viruses. This is dangerous especially if you have confidential data saved on your PC as it can be exploited easily if you don’t remove such malicious software the right way. This can lead to data breaches, cybercrime, and the worst-case scenario can be identity theft. Error code 0x80073b01 symptoms include:

• Sluggish pc performance,
• Problems during software installations
• Beeping sounds
• Unexpected shutdowns
• Screen freeze

Solution

Error Causes

The error code 0x80073b01 occurs when Windows Defender gets damaged due to misconfigured files and registry corruption. It is advisable to fix this error right away to avoid serious damages.

How to Resolve the Error Code 0x80073b01?

To repair the error code 0x80073b01 on your PC you don’t necessarily have to call a professional; you can fix it on your own with the help of Restoro. It’s very easy to use and does not require you to be technically sound. Besides, it can be downloaded for free thus helping you save hundreds of dollars that you are likely to spend on hiring a technician for the error code repair job. Restoro is the latest and a multi-functional system optimizer and a repair tool. This software is integrated with highly functional features that enable you to resolve almost all types of PC-related errors including the error code 0x80073b01. It includes powerful and value-adding features like registry cleaner, system stability detector, privacy error finder with anti-virus properties, and Active X and Class issues detector. With the help of its ‘registry cleaner’, you can easily scan for 0x80073b01 error codes on your PC. It offers in-depth registry cleaning scanning all the underlying causes of registry corruption that triggers 0x80073b01 error. The underlying cause for registry corruption is the accumulation of unnecessary and malicious files in the registry like junk files, temporary internet files, and invalid entries. Restoro with the help of its registry cleaning utility clears the clutter in seconds, frees up your disk space, and repairs the registry. And since the error 0x80073b01 hampered your ability to scan for viruses and spyware with Windows Defender, your computer may be exposed to serious data security threats by such malware. However, with Restoro you can remove malware from your system too. Restoro also functions as a powerful anti-virus. With the help of its privacy error detector, it scans for malicious viruses, adware and spyware on your PC ensuring that you are safe and protected from data breaches and cybercrime. This tool resolves the error 0x80073b01 successfully while repairing your registry and simultaneously optimizing the speed of your PC. It has a user-friendly interface and a simple design. There is absolutely nothing complex about it. All you have to do is download and install Restoro on your system and run it to scan for errors. After the scanning is complete, you will see a comprehensive and detailed error report specifying the number and the types of errors your PC is inflicted with. Now all you have to do is click on the Repair button to fix the issues on your PC including the error 0x80073b01 right away. Restoro is a safe and efficient tool that helps you resolve PC issues in seconds. For optimum results, it is advisable to run it on your PC regularly. This will help you keep the registry clean, PC error-free, reduce boot time, and ensure speedy PC performance. Click here to download Restoro on your PC today!

Compare Exchange128 error – What is it

Some Windows 7 and Windows 8.1 users reported experiencing a Compare Exchange128 error when trying to upgrade to Windows 10. The error reads, “You can’t install Windows 10 because your processor doesn’t support CompareExchange128”. In order to upgrade to Windows 10 (64-bit), the CMPXCHG16B instruction must be present. If you receive this error, this mostly means that your CPU doesn’t have the CMPXCHG16B instruction.

Solution

Error Causes

The CompareExchange128 error normally occurs due to two possible reasons:

• CPU lacks CMPXCHG16b Instruction
• Old & Outdated BIOS – Even if your CPU has the CMPXCHG16b instruction, the CompareExchange128 issue can still occur if you have an older BIOS.

Further Information and Manual Repair

One main requirement to upgrade to Windows 10 is for your CPU to have the CMPXCHG16b instruction. You also need the right BIOS version to guarantee a smooth installation. See below on how to manually fix this issue.

NOTE: If you don’t feel confident using the manual methods listed below, it’s highly advisable to get help from an expert technician. If you don’t know someone, you can also use an automated tool to fix this.

Before performing any fixes, try to determine first if the cause of the error is due to your CPU lacking the CMPXCHG16b instruction. You can use a CPU Info tool that provides complete details about your processor, memory, and motherboard. If you’re looking for more in-depth information, you might also try command-line utilities. But, the safest and easiest way to check this is by simply searching online. Try using the search query: <CPU Model> CMPXCHG16b

Method 1 – Update your BIOS

This method will download the latest BIOS from your motherboard’s manufacturer. This makes sure your CPU has the CMPXCHG16b instruction needed to complete the Windows 10 64-bit installation. To update your computer’s BIOS, complete the following steps:

1. Determine first the current BIOS you have on your computer. Open System Information Windows app and type msinfo32 in the search bar. The BIOS version will appear under the processor speed. Record it somewhere.

2. Go to the support page of your motherboard’s manufacturer. Find if there’s any update on the BIOS that you’re currently using. If you find one, download the BIOS update file available. Make sure that you’re looking into the right model and you download all the necessary documentation. Otherwise, the BIOS update might not work.

3. Update your BIOS. Most BIOS update steps are straightforward. Just make sure to follow the steps provided.

Method 2 – Install Windows 10 32-bit version

If updating the BIOS doesn’t work, what you can do is install a 32-bit version of Windows 10 instead of the 64-bit version. Here’s how to do this:

1. Download and install the 32-bit version of Windows you currently have. If you have a Windows 7 64-bit version, get the 32-bit version of Windows 7. The same goes for Windows 8.1. When you do this, you might want to back up your files first. Remember that installing the 32-bit version works like other installations, and could delete some of your files.

2. After installing the 32-bit version, go to Updates and install all the necessary updates. This includes upgrading to Windows 10 if you’re asked to.

3. When you installed the Windows 10 upgrade, you’ll now have the Windows 10, 32-bit version installed. This will be the version activated on Microsoft servers. Despite this, the activated version stored is only applicable to your computer’s hardware, not the version of Windows 10.

4. Download Windows 10, 64-bit version.

5. Prepare an empty DVD or USB flash drive. Use Creation Media software then click the Create Installation Media for Another PC option.

6. Install the 64-bit Windows 10 version you downloaded from Step 4. Make sure not to put anything when you’re asked to input the serial number.

7. Once the installation is complete, you’ll have the 64-bit version of Windows 10.

Method 3 – Buy a new processor/motherboard

If the above two methods don’t work, there’s a great chance that this error occurs because of an outdated processor/motherboard. Your next possible solution is to buy an updated model that’s fully compatible with 64-bit Windows 10.

Method 4 – Download an automated tool

If all else fails, you might want to consider using this powerful automated tool to quickly fix the problem and any other computer-related issues.

22H2 update for Windows 11 will arrive later this year and although Microsoft is not releasing anything big there will be some interesting improvements and fixes. We take a look at some that caught our attention.

Phishing protection

One of the most interesting upcoming features is enhanced phishing protection. Microsoft Defender SmartScreen will be upgraded to alert users when they try to store passwords in plain text files and also if they accidentally type in a Microsoft account password on phishing sites.

"These enhancements will make Windows the world's first operating system with phishing safeguards built directly into the platform and shipped out of the box to help users stay productive and secure without having to learn to be their own IT department,"

Microsoft

File Explorer gets tabs, a modern sidebar, and contextual suggestions

Finally, Windows File explorer is getting tabs that will allow much easier management of folders and files inside it.

It is confirmed that Microsoft is also working on a new 'HOME' sidebar that should be modern in design and in features including OneDrive so you can find everything in one place.

Pinning of favorite files was also mentioned so you can easily pin favorites for quick access.

Full-screen widgets

Windows 11 has brought back widgets in a new way and from all the feedback users are loving them. Currently, you have a widget sidebar on the left part of the screen where you have your chosen store widgets but from the Microsoft teaser, we will have soon the option to have them in full screen.

If you are using a widget for reading news, blogs, etc. this feature will be very good since you will be able to use your whole screen for information and not just a part of it.

Suggested actions

Another new feature is 'suggested actions' which is going to be particularly useful in apps like Microsoft Teams. With this new feature, you can highlight a date in a Teams message and Windows will suggest actions.

For example, if you highlight a date, you'll see a recommendation to create an event in Microsoft Calendar for that day.

Windows 11 release date is closing in, some people have tried it via insider build, some have decided not to. It has come to our attention that there is a little website made by BlueEdge that offers a virtual Windows 11 desktop. Opening the Website will put you right inside Windows 11 desktop, now take note that this is not Windows 11, it is a simulation of Microsoft’s newest OS and therefore many things will not work like File Explorer, etc. One thing you can make sure it is working is UI itself, you can see how you do like the new Taskbar, start menu, widgets, and some other things. You can just pop up on the site and check how you do like the overall new look and feel of Windows 11 UI before installing it or trying it. We are sure that many more options will come in time but even now you can get a feel of the newest OS. Windows 11 BlueEdge site: https://win11.blueedge.me/

For PC users that are blind or have low vision, the Narrator accessibility feature in Windows 10, lets you use your PC without a display or mouse to complete common tasks – it reads and interacts with things on the screen, like text and buttons. The narrator can be used to read and write an email, browse the internet, and work with documents. In Windows 10, there are a lot of options for Narrator that you can customize. You can change its keyboard shortcuts, personalize Narrator’s voice, enable Caps Lock warnings, and more. You can choose the voice for the Narrator, adjust the speaking rate, pitch, and volume. To change the default audio output device used to play the voice of the Narrator in Windows 10:

• Press the ⊞ WINDOWS + I
• From the Settings menu, click Ease of Access.
• Click Narrator on the left pane.
• In the Narrator window, on the right pane, toggle the button to On to enable Narrator if required.
• Scroll down to the Personalize Narrator’s voice section.
• For the Select where you hear Narrator’s voice option, click the drop-down and select the audio output device you want from the list. Please know that you will not be able to choose if you do not have multiple audio output devices connected to your Windows 10 computer.
• Exit Settings when done.

If you would like to read more helpful articles and tips about various software and hardware visit errortools.com daily.