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

If you are trying to update or upgrade your Windows 10 computer using the Windows Update and suddenly an “Error 0x800f0900” appears, then you’ve come to the right place as this post will help you resolve this Windows Update issue. When you encounter this error, you will see the following error message on your screen:

“There were problems installing some updates, but we’ll try again later. If you keep seeing this and you want to search the web or contact support for information, this may help: 2018-03 Cumulative Update for Windows 10 Version 1709 for x64-based Systems (KB4088776) – Error 0X800F0900”

This kind of Windows Update error is most likely caused by some corrupted files in the system. It is also possible that the Windows Database might have become corrupted as well. So if you are currently experiencing this problem, refer to the options given below and see which one of them works best for you.

Option 1 – Try running the DISM Tool

Running the DISM Tool helps in repairing the Windows System Image as well as the Windows Component Store in Windows 10. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth”.

• Open the Command Prompt as admin.
• Then type in this command: exe /Online /Cleanup-image /Restorehealth
• Do not close the window if the process takes a while as it will probably take a few minutes to finish.

After you run this tool, a log file is created at C:WindowsLogsCBSCBS.log. On the other hand, if the Windows Update client is already broken, you will be prompted to use a running Windows installation as the repair source or use a Windows side-by-side folder from a network share, as the source of the files. Although the chances of this happening are less, if it turns out to be the case, you need to run an advanced command in the DISM tool to repair a broken Windows Update. Just repeat the process above but use the following command instead:

DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:RepairSourceWindows /LimitAccess

Option 2 – Try running the System File Checker or SFC scan

The SFC scan or System File Checker is a built-in command utility in Windows that helps in restoring corrupted files as well as missing files that cause several issues in the computer like the Windows Update Error 0x800f0900. It replaces bad and corrupted system files with good system files. To run the SFC command, follow the steps given below.

• Tap Win + R to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

Option 3 – Try running the Windows Update Troubleshooter

Running the built-in Windows Update troubleshooter could also help you resolve the Windows Update error 0x80073712. To run it, go to Settings and then select Troubleshoot from the options. From there, click on Windows Update and then click the “Run the troubleshooter” button. After that, follow the next on-screen instructions and you should be good to go.

Option 4 – Perform a System Restore

You can also try to perform a System Restore as it can also help you fix the Windows Update Error 0x800f0900. You can do this option either by booting into Safe Mode or in System Restore. If you are already in the Advanced Startup Options, just directly select System Restore and proceed with the next steps. And if you have just booted your PC into Safe Mode, refer to the steps below.

• Tap the Win + R keys to open the Run dialog box.
• After that, type in “sysdm.cpl” in the field and tap Enter.
• Next, go to the System Protection tab then click the System Restore button. This will open a new window where you have to select your preferred System Restore point.
• After that, follow the on-screen instructions to finish the process and then restart your computer and check if the problem is fixed or not.

Option 5 – Reset both the SoftwareDistribution and Catroot2 folders

You have to stop a couple of services such as BITS, Cryptographic, MSI Installer, and Windows Update Services. And to do that, you need to flush the contents in the SoftwareDistribution folder. The Software Distribution folder in the Windows operating system is a folder that can be found in the Windows directory and is used to store files temporarily which might be required to install the Windows Update on your PC. Thus, it is required by the Windows Update and maintained by WUAgent. Aside from that, it also contains all the Windows Update History files and once you delete them, you will most likely lose the Update history. As a result, the next time you run the Windows Update, it may result in a longer detection time.

• Open the WinX Menu.
• From there, open Command Prompt as admin.
• Then type in the following command – don’t forget to hit Enter right after typing each one of them.

net stop wuauserv net start cryptSvc net start bits net start msiserver

• After entering these commands, it will stop the Windows Update Service, Background Intelligent Transfer Service (BITS), Cryptographic, and the MSI Installer
• Next, go to the C:/Windows/SoftwareDistribution folder and get rid of all the folders and files thereby tapping the Ctrl + A keys to select them all and then click on Delete. Note that if the files are in use, you won’t be able to delete them.

After resetting the SoftwareDistribution folder, you need to reset the Catroot2 folder to restart the services you just stopped. To do that, follow these steps:

• Type each one of the following commands.

net start wuauserv net start cryptSvc net start bits net start msiserver

• After that, exit Command Prompt and restart your computer, and then try to run Windows Update once more.

What is Error Code 100?

Error Code 100?? Whenever a Setup error contains error codes in the message, this indicates what the setup was operating on, let’s say copying files. The text in the error message will determine whether that it is fatal or not. An error code 100 is a system error that is displayed as ‘ERROR_TOO_MANY_SEMAPHORES’ or as a value 0x64. This error means that the system ‘cannot create another system semaphore.’ A semaphore is used in controlling access to parallel programming or a multi-user platform through multiple processes. This error can prevent certain features of your Windows to perform properly, like trying to get a print, copying files, deleting files, or any other routine computer activities.

Solution

Error Causes

Error code 100 can affect a wide range of activities that you normally perform on your PC. This error can occur for a number of reasons, of which some of the common ones include:

• When the Microsoft SQL Server fails to start the service
• When the account used for starting AOS does not match the database in SQL Server
• When the AOS licenses have exceeded their limit
• When the SQL Server database is incorrectly case sensitive

Though these are the common causes for error code 100, there can be other ways through which this error can occur. To find out the specific cause for error code 100, follow these steps:

• Go to Start and select All Programs. Go to Administrative Tools and click Even Viewer
• Click Application in Even Viewer
• Locate the error message in the right pane by scrolling down
• Click on the error message and see if the message applies to the error code.

Further Information and Manual Repair

In order to manually repair this error, you will have to work with your Network Administrator as they will have security privileges to take the steps. However, there are more than one ways to resolve this issue, for instance:

1. Starting SQL Server Service
   • A likely cause of an error code 100 can be that your SQL Server service is not started. To activate it, follow these steps:
   • Got to Start and Click on All Programs, go to Administrative Tools and click on Services
   • Find SQL/MSSQLServer service
   • Right Click on it and click Start to activate the service
2. Network Resolve

If you are connected to a network, then you can work with your network administrator to fix error code 100. Follow these steps to resolve this error:

• Got to Start and then Run. Type dcomcnfg and press Enter
• Locate Default Security and click it
• Find Default Access Permissions and click Edit Default
• You should locate System and Interactive, listed in the Allow Access. If they’re not listing, you can add them by clicking Add
• Find the local computer in the list and click on Allow Access
• Click Ok on the following three steps
• Log off the computer and log in again.

HowToSimplified is a browser extension developed by MindSpark inc. This extension offers users easy access to DIY tutorials, guides, and websites just a few clicks away. There is also a top video selection with the most popular DIY videos at the moment.

This extension, though it may look useful in the beginning, hijacks your browser's default search provider, it changes your default home page to HowToSimplified, powered by the MyWay search engine. During your browsing sessions, it will record your website visits, collect information, clicks, and sometimes even personal data. This information is later used to deliver ads that are injected into your browser search results. Aside from sponsored links, and additional unwanted ads that this extension displays, it also may from time to time display pop-up ads during your browsing sessions.

Multiple anti-virus scanners have detected HowToSimplified as a Browser Hijacker and are therefore not recommended to keep on your computer for security and privacy reasons.

About Browser Hijackers

Browser hijacking means that a malicious program code has control over and altered the settings of your internet browser, without your approval. Almost all browser hijackers are made for marketing or advertising purposes. In most cases, browser hijacking is used for earning ad revenue that comes from forced advert clicks and site visits. It could seem naive, but most of such sites aren’t legitimate and could pose a severe threat to your online safety. In a much worst case, your browser can be hijacked to download malware that can do a lot of damage to your computer system.

How you can recognize a browser hijack

There are many symptoms that indicate your browser has been highjacked: home page is changed; bookmark and the new tab are also changed; the default web engine is changed and your browser security settings have been cut down without your knowledge; find new toolbars that you simply didn’t add; unstoppable flurries of popup advertisements show up on your personal computer screen; your internet browser has become unstable or starts running sluggishly; you can’t navigate to certain internet pages, like computer security software related websites.

How they invade PCs

Browser hijackers infect computer systems through malicious email attachments, downloaded infected documents, or by visiting infected websites. They can also be deployed via the installation of a web browser toolbar, add-on, or extension. Other times you may have accidentally accepted a browser hijacker as part of an application bundle (generally freeware or shareware). An example of some notorious browser hijacker includes Babylon, Anyprotect, Conduit, DefaultTab, SweetPage, Delta Search, and RocketTab, but the names are regularly changing. Browser hijacking can lead to severe privacy issues and even identity theft, disrupt your browsing experience by taking command over outbound traffic, drastically slows down your personal computer by consuming a lot of resources, and cause system instability as well.

Browser Hijacker Malware – Removal

The one thing you can try to get rid of a browser hijacker is to find the malware inside the “Add or Remove Programs” list of the Windows Control Panel. It might or might not be there. When it is, uninstall it. However, many hijackers are harder to track down or remove since they might get themselves associated with some critical computer files that enable it to operate as a necessary operating-system process. Amateur computer users shouldn’t ever attempt the manual form of removal methods, since it requires detailed system knowledge to carry out repairs on the computer registry and HOSTS file.

How One Can Eliminate a Virus that is Blocking Websites or Preventing Downloads

Practically all malware is detrimental and the extent of the damage will vary greatly depending on the type of malware. Some malware is meant to hinder or block things that you want to do on your computer. It may well not let you download anything from the web or it will prevent you from accessing a few or all internet sites, especially the anti-malware websites. If you are reading this article right now, you may have perhaps realized that a malware infection is the cause of your blocked internet connectivity. So how to proceed if you need to install an anti-malware program like Safebytes? There are a few actions you can take to get around this problem.

Install the anti-malware in Safe Mode

The Windows operating system comes with a special mode referred to as “Safe Mode” where just the minimum required applications and services are loaded. If the malware is obstructing the internet connection and affecting your PC, starting it in Safe Mode allows you to download anti-malware and run a diagnostic scan while limiting potential damage. To enter into Safe Mode or Safe Mode with Networking, press the F8 key while the PC is starting up or run MSCONFIG and look for the “Safe Boot” options under the “Boot” tab. Once you’re in Safe Mode, you can attempt to install your anti-malware software application without the hindrance of the malicious software. At this point, you can actually run the antivirus scan to get rid of viruses and malware without interference from another malicious application.

Obtain the anti-malware program using an alternate web browser

Web-based viruses can be environment-specific, targeting a particular internet browser or attacking specific versions of the web browser. If you seem to have a trojan attached to Internet Explorer, then switch to a different browser with built-in security features, such as Firefox or Chrome, to download your favorite anti-malware program – Safebytes.

Install and run anti-malware from the USB drive

Another solution is to create a portable anti-malware program on your USB thumb drive. Try these simple measures to clear up your infected PC using portable anti-malware. 1) Download the anti-malware on a virus-free computer. 2) Plug the Thumb drive into the uninfected computer. 3) Double-click the Setup icon of the antivirus program to run the Installation Wizard. 4) Choose a thumb drive as the place when the wizard asks you where you want to install the application. Follow the on-screen instructions to complete the installation. 5) Transfer the USB drive from the uninfected PC to the infected PC. 6) Double-click the EXE file to run the Safebytes software right from the thumb drive. 7) Click on “Scan Now” to run a complete scan on the affected computer for viruses. If, after all of these methods, you are still having troubles with the possible infection, feel free to write to us with your question, through chat or email. If you are unsure which method to employ, simply call our toll-free number 1-844-377-4107 to speak to our technical support team. Our experts can walk you through the virus removal process on the phone and fix the computer remotely.

Protect Your Personal Computer From Viruses and Malware With SafeBytes Security Suite

Nowadays, an anti-malware tool can protect your laptop or computer from various kinds of internet threats. But exactly how to choose the best one amongst the many malware protection software that is available on the market? Perhaps you might be aware, there are several anti-malware companies and products for you to consider. A few of them are great but there are lots of scamware applications that pretend as authentic anti-malware software waiting to wreak havoc on the computer. You must be careful not to choose the wrong product, especially if you purchase a paid application. When thinking about trustworthy programs, Safebytes AntiMalware is certainly the highly recommended one. SafeBytes anti-malware is a powerful, highly effective protection tool designed to assist users of all levels of IT literacy in detecting and eliminating malicious threats from their PC. This tool can easily detect, eliminate, and protect your PC from the most advanced malware intrusions including spyware, adware, trojan horses, ransomware, parasites, worms, PUPs, as well as other possibly damaging software programs. SafeBytes has great features when compared to other anti-malware programs. A few of them are listed as below: Best AntiMalware Protection: Built on a highly acclaimed anti-virus engine, this malware removal application has the capacity to identify and remove various obstinate malware threats such as browser hijackers, potentially unwanted programs, and ransomware that other common anti-virus software will miss. Live Protection: SafeBytes provides real-time active monitoring service and protection against all known computer viruses and malware. It’ll constantly monitor your computer for hacker activity and also gives users superior firewall protection. Web Protection: Safebytes allots all websites a unique safety score that helps you to have an idea of whether the webpage you’re about to visit is safe to view or known to be a phishing site. “Fast Scan” Features: SafeBytes Anti-Malware possesses a multi-thread scan algorithm that works up to five times faster than any other protection software. Very Low CPU and RAM Usage: SafeBytes is a lightweight application. It uses up a really small amount of processing power as it works in the background therefore you won’t notice any computer performance difficulties. 24/7 Customer Support: You will get 24/7 technical support to quickly resolve any concern with your security tool.

Technical Details and Manual Removal (Advanced Users)

If you wish to manually remove HowToSimplified without the use of an automated tool, it may be possible to do so by removing the program from the Windows Add/Remove Programs menu, or in cases of browser extensions, going to the browsers AddOn/Extension manager and removing it. You will likely also want to reset your browser. To ensure the complete removal, manually check your hard drive and registry for all of the following and remove or reset the values accordingly. Please note that this is for advanced users only and may be difficult, with incorrect file removal causing additional PC errors. In addition, some malware is capable of replicating or preventing deletion. Doing this in Safe Mode is advised.

The following files, folders, and registry entries are created or modified by HowToSimplified

From photo editing and compositing to digital painting, animation, and graphic design you can do it all in Photoshop. Bring ideas to life across desktop and iPad. Magically transform images with the power of AI. Learn new skills and share your projects via Livestream. Started as a photo editing application, photoshop has surpassed the original ideas and designs in the following years growing with each release and including more tools and flexibility not matched in other applications. Photoshop was the first to introduce many new features and set standards for other applications. How years have passed product grew and innovation was pushed forward, it took some time but eventually, photoshop was able to set itself as the industry-standard application for pixel editing and it holds that position even today. Throughout the world artist all over the globe are using it to create digital art in various fields be that illustrations, film, photography, texturing, etc. Its vast majority of tools and possibilities as well as its extensibility with plugins, actions, brushes have cemented it in the highest place in any designer or artist toolkit. Today you can get it as a part of a creative suite for a monthly fee on the official adobe website and even if you do not need other creative suite applications photoshop is worth the fee alone. Simply you have to try it, learn it, and then harvest its power. If you would like to read more helpful articles and tips about various software and hardware visit errortools.com daily.

Steam is one of if not the largest online store for the digital distribution of games on the PC platform. The game gets downloaded to your PC when you are planning to play it and its saves are synched in the Steam cloud. They get automatically downloaded when you install the game but you can also get your saves by directly downloading them from Valve's website in your browser. If Steam isn’t automatically downloading your old save games after you install a game, ensure Steam Cloud is enabled for that game within Steam. Locate the game in your Steam library, right-click it, and then select Properties. Click the Updates tab and ensure the Enable Steam Cloud synchronization option is checked for the game. If this option isn’t checked, Steam won’t automatically download your cloud saves. If you don’t see a Steam Cloud option for a game here, that game doesn’t support Steam Cloud. Not all games on Steam do, it’s up to each game developer.

Download the Files in Your Web Browser

Valve lets you download your Steam cloud save files via a web browser, too. You can download just your saved files without re-downloading the entire game. To find your saved files, visit Valve’s View Steam Cloud page in your web browser and sign in with your Steam account. You’ll see a list of games using your Steam Cloud storage. Locate the game in the list and click Show Files to see all the files for a game. Each game has a page showing all the files it’s storing in Steam Cloud, as well as the date they were modified. To download a file, click Download. Download all the save files for your game, and you’ll have a copy of its save games. This feature is especially useful for multi-platform games that don’t automatically synchronize save files between platforms.

As we near the end of 2022 we look at the current best antivirus software for popular platforms, why they are the best, and why you should get them.

Avira, a great free Antivirus

Avira has been around a long time with its free antivirus version of the larger protection suite. It had its ups and downs but the latest versions are really great. With high-speed scans and low system impact, Avira antivirus is really one of the best free antivirus software currently on the market.

The software itself has also received UI & UX updates making it straightforward and easy to use. The virus scanning engine is the same as in paid version that ranks among the top engines in the world for this type of work. The package also gives you some great browser protection and a good firewall as well, there is really no excuse to skip on this if you want a free solution.

The only thing that we would say is not so great in Avira is reporting some false positives, sometimes even for MS updates, it is rare but it can happen.

Malwarebytes, a powerful Windows antivirus

Malwarebytes Premium is easy to use, simple antivirus solution that shies away from complicated UI, and simply put, it just works. Its scanning engine is well-known and places among the top and best in the world often finding some malware that other can miss.

Another great thing is its integration with Windows itself, it is one of the rare applications that can and will work incredibly well beside your typical Windows protection tools so you can have both of them running at the same time.

Installation and running are really simple and every typical PC user will find it as easy as walking in the park. On the other hand, sadly system impact is a little high and it will have issues running on lower-end systems due to its memory requirements.

Intego MAC Internet Security X9, the best Mac antivirus

Gone are the days when MAC had no virus issues, since MAC rose in popularity among the users, also rose the number of viruses and malware. The system itself has some great protection built it inside but for more security and better control of it, you will need a third-party dedicated solution.

Intego was made by Mac antivirus experts who have been building this kind of software last 25 years. The interface is easy to use and premade presets are really helpful, but the security suite can also be customized to fit your needs and desires.

Since this is only available as a security suite, you are getting a firewall and some other security tools along with your antivirus that will run as a part of it.

The bad side is that scans can sometimes run slow, most of the time they are OK in terms of speed but occasionally they can switch to slower speeds and impact scanning time to some annoying times. Also, there is no webcam protection nor VPN service included where others on this list have them.

Bitdefender mobile security: best Android protection

While protection is not only needed for your gaming or workstation, software suites that are dealing with mobile and tablet security exist. The best of them is the Bitdefender antivirus mobile suite. Low on system resources and low on performance impact with the really great virus detection rate Bitdefender is at the top of suites for your phone.

Consistent high virus detection packed with low battery impact is great but the suite comes with tons of other tools as well like browser security tools, email protection, and real-time link and notification protection.

The application will always scan each file and newly installed application in the background and alert and cut off any found threat. App itself is easy to install and use and most of the time it will do everything in the background for you but offer you customization if you need it.

The package also includes VPN and application lock that will let you protect the critical applications from being accessed as well as an online account scanner. Anti-theft and anti-loss tools, which allow you to find, remotely lock or wipe a stolen or lost device, add yet another layer of protection.

One thing that is missing from this great package is fraudulent call protection. Newer Android phones have this feature inside but it would be nice if Bitdefender had it as well.

Bitdefender, the best antivirus software

Now that we have covered specific cases of each platform, there is one player that has all of them covered and with a quality product, that player is BitDefender and it is great. Personally, this is my protection suite of choice and as I type this it is running in the background.

Bitdefender has it all, low system impact, as a matter of fact, it is one, if not, the lowest performance impact engine on the market currently and that is packed with a great and highly consistent virus & malware detection suite. Along with real-time malware protection, browser security, and anti-spam tools, you also get anti-phishing defenses, ransomware protection, and a strong firewall.

Bitdefender scores are very high in both the zero-day threat and real-world protection tests at AV-Test, an established organization that tests antivirus software. Despite being tested against tens of thousands of well-known and widespread malware threats, the software consistently achieves a 100% blocking rate.

The suite also comes with a restricted free VPN and with parental controls as well. Webcam and microphone protection are also included in the suite and on top of all, it has great pricing plans and constant discounts.

BitDefender is really a great package and it might sound too good, but after years and years of personally using it I have not had single malware or virus issue, the only thing that I would put as a negative is that system is severely slowed down when system scans are performed so be sure to run or schedule them when you are not using your computer. This, of course, can put some people off and I will admit it is a serious drawback but for me, the security of my workstation is more important than leaving the computer for 20 or so minutes in order to perform a full scan of the system.

Error Code 0xC004C770 – What is it?

If the Error Code 0xC004C770 popped up on your computer during your activation of the Windows 10 software, don’t worry. This is a fairly common error, especially for people who own more than one computer upon which Windows 10 is installed and activated. The gist of this error code is that the product key that you have entered has already been claimed or used on a different computer. Because there are limitations on the number of computers that can use any given license activation code or product key, this error code can arise when you have exceeded that limit. If you have a single-use license and have already entered the particular product key onto another machine, you may see this error come up during activation.

Both Error Code 0xC004C770 and Error Code 0x803FA071 arise from the same problem and the same steps can be used to resolve both error codes.

Solution

Error Causes

Error Code 0xC004C770 is likely to appear on your screen during activation of Windows 10 if you or anyone else in your organization have already entered in the product key used on another computer. If you have a multiple-use license, the product key that you are entering may already have been used for the maximum number of computers allowed under that license.

Further Information and Manual Repair

There are two basic methods for addressing the issues associated with Error Code 0xC004C770. These methods can easily be implemented by anyone who is comfortable interacting with the Windows Store from their computer, which makes the resolution of this particular error code fairly simple and straightforward.

If you are unable to complete the steps below or Error Code 0xC004C770 has not been resolved after following the guides below, contact a Windows technician who is familiar with the Windows 10 activation process to assist you in the process. You can also get in touch with the Windows technical support team to assist you in the process if needed.

Method One: Purchase A New Product Key from Windows

If you have already used the product key on another computer or have used it on the maximum number of allowed devices, you may need to purchase an additional product key for the computer with Error Code 0xC004C770. Product keys can be purchased physically from a retailer that sells Windows 10 software licenses or purchased directly from the Windows store.

To purchase a new product key directly from the Windows Store, follow the steps below:

• Step One: Select the Windows start button at the bottom of your toolbar. Click on “Settings,” then select the option for “Update and Security.”
• Step Two: Click on the “Activation” option.
• Step Three: In the menu that appears, choose the option to “Go to Store” and follow any on-screen instructions to finalize a purchase of the Windows 10 software and product key.
• Step Four: Use the new product key to complete the installation and activation of the Windows 10 software on your computer.

If you are unable to see the “Go to Store” option when you reach the “Activation” page, you may not be set as an administrator of your machine. In this case, get in touch with the support personnel from your company to complete the purchase, installation, and activation process on your computer.

Method Two: Attempt to Finish Activation via Phone

For users who have changed out parts of their computer’s hardware, like putting in a new motherboard or activating a new hard drive, you may have more success if you attempt activation through a phone.

In order to activate your copy of Windows 10 from your phone, follow the steps below:

• Step One: On your mobile device, open up the search box from the taskbar.
• Step Two: In the search box, enter the phrase “SLUI 04.”
• Step Three: Select the “SLUI 04” option that appears.
• Step Four: Follow the directions given on the screen to complete the activation process for your copy of Windows 10.

As with any error code resolution, if the methods above are not successful or if you are not comfortable with your ability to successfully complete the steps above, get in contact with a qualified professional who is trained in the Windows 10 activation process to assist you or download a powerful automated tool to get the job done.

Stop C00002lA Fatal System Error- What is it?

C00002lA Fatal System Error is a blue screen of death error that may occur when you start your Windows NT 4.0 based computer. This error causes the screen to turn blue and the system also shuts down. The stop C000021A error message is displayed in the following format:

Stop c000021a {Fatal System Error} The session manager initialization system process terminated unexpectedly with a status of 0xc0000017 (0x00000000, 0x0000000) The system has been shut down.

Error Causes

The stop C000021A error occurs when either Crsrss.exe or Winlogon.exe fails. When the Windows NT kernel identifies that either of these processes has failed, it stops and the error code stop C000021A appears on the computer screen. Here are some of the underlying causes for the stop C0000021A error:

• The incompatible third-party program
• Hard disk issues
• Service pack installation has failed
• Mismatched system files have been installed
• Bad and invalid registry keys

Further Information and Manual Repair

To resolve the stop C000021A Fatal System Error on your PC try the following solutions:

• Remove Incompatible Third Party Programs

If the error occurred after you recently installed a new program, then it is advisable to remove that program. The error occurs due to the incompatibility of the program. To remove the program go to the start menu and click on the control panel. Now click on Add/Remove Program tab and double click on the program name that you recently installed and remove it from the list. Once removed, not reboot your PC. Reinstall a compatible program and run it. It is most likely to resolve the issue. However, if the stop C000021A error still occurs, then it means the problem is critical. It is related to the registry.

• Repair and Restore the Registry

This procedure is slightly long and tricky. To try it, you need to be technically sound. Here’s what you have to do: first create a parallel installation of Windows NT. Start your PC to the parallel installation and then open the Registry Editor. On the Registry Editor’s Windows menu click HKEY_LOCAL_MACHINE on Local Machine and then click Load Hive. Now type the path %systemroot%system32configsystem into the System hive of the prior installation. Then click open. Here you will be prompted to enter the name of the key, type TEST. Note the setting for the current DWord value in the preceding registry key. This is 0x1 and is denoted by CURRENT:Reg_Dword: 0x1. This value indicated that the Current Control Set for your original Windows NT installation corresponds to ControlSet001 in this window. Now if the value is 2, it indicated that the Current Control Set corresponds to ControlSet002. Now locate the following registry key: HKEY_LOCAL_MACHINETESTControlSetXXXControlSession Manager. XXX is the Current Control Set Value. And delete any pending file rename operation entries. Then click TEST hive and then click Unload Hive. After that again repeat the process, open the registry menu and click load hive, here type the path %systemroot%system32configSoftware to the Software hive of the prior installation and then click open. Now you type TEST 2 when you are prompted for the name of the key. Remove any pending file rename operations entries in the following registry keys: HKEY_LOCAL_MACHINETEST2MicrosoftWindowsCurrentVersionRunOnce HKEY_LOCAL_MACHINETEST2MicrosoftWindowsCurrentVersionRunOnceEx Now click TEST2 hive and then click unload hive. Quit the Registry Editor and then restart your original installation. This will resolve the stop C000021A error.

Buying a product and then finding out that is not working is one of the most annoying and disappointing things that a consumer can experience. It is no secret that Adobe software and services online can malfunction or detect somewhat false information and behave accordingly placing buyers in an awkward position. Adobe no matter how huge and great can also still sometimes has software that can misbehave in this way and sometimes downloading their suite and buying it after can not be 100% registered and even after the money is transferred and purchase has been completed you can still have a trial status for your adobe cloud applications. In this guide, we will address this issue and see how we can fix it so you can get back to your creative work in no time. Follow this guide as it is presented step by step.

1. Wait an hour

   No, seriously, wait an hour. Sometimes transaction and registration of transaction along with activation can take up to one hour of time. If you just made a purchase and you are still under trial in the launcher, give it a little time to detect the purchase and adjust accordingly.

2. Check to see if your subscription is active

   Sign in to https://account.adobe.com/plans. If you have more than one account, make sure you sign in with the proper one. Under My plans, select Manage plan. In the Plan Information section, check to make sure that your subscription is active. If it’s expired, it's likely why you’re seeing messaging that indicates you are in trial mode or that your trial has expired. If your subscription is showing as active, then an out-of-date payment method may be the issue. To see if your payment information is current, in the Plan information section, select Manage payment. If your payment method isn’t current, update your credit card information in the pop-up window and select Save. Your new payment method will take effect in the next billing cycle.

3. Sing out and then sign back in

   Open the Creative Cloud desktop app. (Select the icon in your Windows taskbar or the macOS menu bar.) Select the Account icon in the upper right, and then select Sign out. In the confirmation dialog box, select Sign Out. The Creative Cloud apps and services associated with your account are deactivated on the computer. Sign in again to your Adobe account. Launch any Creative Cloud app included in your membership, such as Photoshop or Illustrator. If prompted, sign-in on the next screen.

4. Update creative cloud applications

   Open the Creative Cloud desktop app. (Select the icon in your Windows taskbar or the macOS menu bar.) Depending on your version of the Creative Cloud desktop app, do one of the following: On the Help menu, select Check for updates. or
   Select the three vertical dots icon in the upper-right corner of the app. Choose Check for App Updates from the menu. If you aren’t using the latest version of your Creative Cloud app, an update prompt appears next to it on the apps list. Select Update.

5. Remove entries in the HOSTS file

   If the previous solutions do not work, your computer could have trouble connecting to Adobe's activation servers. This could be because of an incorrectly configured Operating System hosts file (Operating system hosts files map host names to IP addresses). To solve this issue, try removing Adobe-related entries from the hosts file. You can remove the Adobe-related entries from the hosts file in two ways: Automatically repair the hosts file using the Limited Access Repair tool: Repair the hosts file using the Limited Access Repair tool. With this method, you do not have to manually edit the hosts file -- the tool automatically repairs the file. Reset the hosts file manually: If the issue is not fixed even after you run the Limited Access Repair tool, reset the hosts file manually: To reset the hosts file on Windows, do the following: Navigate to C:\WINDOWS\System32\drivers\etc. Open the hosts file with a text editor such as Notepad. Check for any Adobe-related entries in the hosts file. If there are Adobe-related entries in the hosts file, move the file to the desktop, for example by dragging. Delete the Adobe-related entries from the hosts file. Make sure that you do not delete any other entries. Save the hosts file that you edited in the previous step. The updated hosts file should not have any Adobe-related entries. Move the file from desktop to the original location: C:\WINDOWS\System32\drivers\etc. When moving the file, select the Replace option. To reset the hosts file on macOS, do the following: To find the hosts file, open Finder and then choose to Go > Go to Folder. In the box, type the following location and then press Return: /private/etc/hosts If you are unable to locate the file, it means that the hosts file is hidden. Type the following command in terminal to unhide the file, and then repeat Step 1. chflags nohidden /etc/hosts Open the hosts file using a text editor such as Text Edit. Check for any Adobe-related entries in the hosts file. If there are Adobe-related entries in the hosts file, move the file to the desktop, for example by dragging. Delete the Adobe-related entries from the hosts file. Make sure that you do not delete any other entries. Save the hosts file that you edited in the previous step. Move the file from the desktop to the original location: /private/etc/hosts. When moving the file, select the Replace option.