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One of the issues with external storage devices is that unplugging them right away without using the “Safely Remove Hardware” feature is not safe and doing so could lead to data corruption and data loss. However, in some cases, even when you use the “Safely Remove Hardware” feature, you could get an error that says:

“Windows can’t stop your ‘Generic volume’ device because a program is still using it. Close any programs that might be using the device, and then try again later.”

It is possible that the system is still using the external device – for instance, a copy operation might still be in progress, or Windows is still indexing the contents of the drive in the background or it could also be that the drive is not configured to be quickly removed. To fix this error, there are a couple of suggestions you can try. You can try to close all the open programs and file explorer windows, or you could also configure the Device Removal Policy or change its file system to FAT32. In addition, you can also try to change its drive letter or use the DISKPART utility to get the drive to be offline or simply manage the hogging process that prevents it from being safely removed. Follow each one of the given potential fixes below to resolve the error when using the Safely Remove Hardware feature.

Option 1 – Close all the open programs and File Explorer windows

The first thing you have to do to resolve the error is to close any open programs as well as File Explorer windows. This is because there are some programs and File Explorer instances that could be using the external device in the background which explains why you’re getting the error when you try to safely remove your device.

Option 2 – Try to configure the Device Removal Policy

The next thing you can do is to configure the Device Removal Policy. How? Refer to these steps:

• Open File Explorer and right-click on the drive where you encountered the error.
• Next, select Properties from the context menu.
• After that, navigate to the Hardware tab and select the disk drive where you got the error under the “All disk drives” section.
• Then select Properties under the Device Properties section. This will open a new mini window and from there, select Change Settings on the bottom portion of the window.
• Now navigate to the Policies tab and select the “Quick Removal (default)” option under the Removal Policy section.
• Click on the OK and Apply buttons to save the changes made and then see if the error is now fixed.

Option 3 – Try to manage the hogging process

You could also try managing the hogging process to get rid of the error.

• Tap the Ctrl + Shift + Esc key combination to open the Task Manager.
• Then look for the running processes and programs that are hogging your USB storage device. If there is a program that’s using your device, it will hog on some Disk or CPU while transferring data and interacting with the device which is why you’re getting an error when you safely remove the device.
• Next, select the concerned processed and right-click on each one of them, and then select the End Task or End Process option. You can also restart the Explorer.exe process and see if that helps.

Option 4 – Try to change the drive letters

• Tap the Win + R keys to open the Run utility and then type “diskmgmt.msc” in the field and click OK or tap Enter to open Disk Management.
• Next, look for your USB storage device using the drive letter that’s assigned to it. Right-click on your device and select the “Change Drive Letter and Paths…” option.
• This will open a mini window and from there select the drive letter you want to change and click on the Change button.
• After that, another smaller window will appear where you’ll have to select the new drive letter from the drop-down menu.
• Click OK and if you got a warning prompt, just click on Yes.
• Now restart your computer.

Option 5 – Try using DISKPART utility to get the drive to be offline

The next thing you can try to resolve the issue is to use DISKPART. Refer to the given steps below to do so.

• Tap the Win + R keys to launch Run and then type “cmd” in the field and tap Enter or click OK to open an elevated Command Prompt.
• Next, type and enter this command to execute it: diskpart
• The command you entered will initiate the DISKPART utility. After that, type and enter this second command: list disk
• Next, type and enter this third command: list volume
• The commands you just executed will help you in either listing all the Disk connects or all the partitions on those disks formed and from there, you need to select one command depending on the “list” command you entered. You can execute either of the two following commands:
  • select disk #
  • select volume #

• After that, it will select the Disk or Partition you want to select.
• Now type either one of the following commands:
  • offline disk #offline volume #
• The command you entered will mark the selected disk is Offline. Afterward, try to safely remove your USB Storage device. Just remember that when you plug it back in again, you have to carry out the same method except for the last given command as this time you will have to enter either of these commands in order to get your USB storage device back online:
  • online disk #
  • online volume #

Option 6 – Try to change the file system to FAT32

If you keep getting this error on a particular USB device, you might have to format the disk and change its file system to FAT32. Make sure that you copy its contents safely into another location before you format the disk. Keep in mind that formatting the disk will remove all the contents of your drive.

• Open File Explorer and right-click on the drive where you got the error and then select Format from the context menu.
• Next, in the newly opened mini window, select the FAT32 (Default) option from the drop-down menu under File System.
• Now check the Quick Format checkbox and then click on the Start button to start formatting your drive.

Disk cleanup is part of Windows 10 tools and it is essential in keeping your computer up and running in optimal settings and to free so much needed space as well as remove temporary files that can accumulate over time. Using disk cleanup from time to time is recommended and a very useful habit that will save you some headaches and optimize your computer running time, speed up boot sequence, etc. Think of it like cleaning up your desk, from time to time it can get too overwhelmed with junk and non-important things and if you are keeping it tidy all the time each time you need to find something it will be much faster and easier, same goes with computers, so if you do not have it, try to develop a habit that once per month you start disk clean up and remove trash from your hard drive. In order to do so, press ⊞ WINDOWS + E to bring File Explorer up Once File Explorer is up and running right-click on the hard drive you wish to run disk cleanup on and click on properties. Properties Windows will open on the general tab, on that tab you have disk cleanup on the lower right part of properties, click on it. Wait for Windows to gather information about your hard drive and files on it. After it is finished you will be greeted with the next screen: Here you can thick and mark which items you would like to get rid of and which ones you would like to keep. Note that you can freely tick all of them and remove them since removing these files will not break WIndows in any way. make your choices and click on ok. You can also click on Clean up system files to run system files cleaner and get rid of junk there, you will not be able to choose any options there, Windows will alone clean up what is not needed. After disk cleanup is finished least thing you will have is more free disk space, but like mentioned, keeping your Windows and computer healthy goes a long way in its usability, speed, and performance.

If you suddenly find the middle mouse button not working as you use it on your Windows 10 computer, then you’ve come to the right place as this post will provide some suggestions that can help you fix the issue. This kind of problem can affect your experience in using your computer as the middle mouse button helps you in scrolling through long web pages and screens with a lot of data. So if that stops, you will end up using your keyboard instead which is kind of a hassle compared to using the middle mouse button. It is possible that this problem could have something to do with either the hardware or software. To isolate the possibility of a hardware failure, you can try to connect the mouse to a different computer and see if it works just fine there or if it still has the same problem. If the mouse works properly on a different computer, then the issue is software-related. It is possible that a software update, especially gaming software, could have been misconfigured in a way that the middle button does not respond like it’s supposed to. To resolve the problem, you might want to try reinstalling or updating the mouse drivers or run the Hardware and Devices troubleshooter. You can also install OEM-specific mouse drivers or modify some entries in the Windows Registry.

Option 1 – Reinstall or update the Mouse driver

The problem may be caused by a corrupted or an outdated mouse driver. To fix it, you have to update or reinstall the mouse driver. How? Follow these steps:

• Open the Devices Manager from the Win X Menu.
• Then locate the Mouse and other pointing devices and right-click on the mouse driver to open the Properties.
• After that, switch to the Driver tab and click on the Uninstall Device button.
• Follow the screen option to completely uninstall it.
• Finally, disconnect the mouse and plug it back in to reinstall the mouse driver.

Note: You can install a dedicated driver on your computer in case you have it or you could also look for it directly from the website of the manufacturer.

Option 2 – Try running the Hardware Troubleshooter

The next thing you can do to fix the problem is by running the Hardware Troubleshooter. Although it won’t make much of a difference, there’s still a possibility that it could automatically fix the problem with these function keys. To use it, refer to these steps:

• 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.

Option 3 – Try to install OEM specific mouse drivers

Aside from updating or reinstalling the mouse drivers, you might also want to try installing OEM-specific mouse drivers. When you install Windows, it will use a generic driver for all its components. The disadvantage of generic drivers for the mouse is that it limits its functionality. In fact, some also configure the middle mouse button to respond to specific action which does not work without the correct drivers. In such cases, you need to visit the website of your computer’s manufacturers to download and install the latest drivers and then open the software and configure it the way it was before. Keep in mind that some OEMs also offer gestures, so you also have to check on that.

Option 4 – Try to modify some entries in the Registry

If a Windows Update is the one that caused the problem, you could correct it by making some modifications in the Registry but before you proceed, make sure that you create a System Restore point first.

• Tap the Win + R keys to open the Run utility.
• Then type “Regedit” in the field and hit Enter to open the Registry Editor.
• Next, navigate to this registry path: HKEY_CURRENT_USERControl PanelDesktop
• After that, double click on the “WheelScrollLines” entry on the right pane to open its Properties.
• Now change its value data to “3” and exit the Registry Editor and then see if the issue with the middle mouse button is fixed or not.

As you know, Microsoft Office Word is a program that’s widely used all over the web and it’s because it’s the best program there is when it comes to editing and processing words. However, even when it is the best there is, it is not without its faults and so on as it can still encounter some errors every now and then. One of these errors is the Template_fields errors. When you encounter such an error, you will see a pop-up window. This strange error randomly appears on documents but you need not worry as this post will provide you with possible solutions to resolve the problem. But before you proceed with these solutions, you have to create a backup for all your Word documents to Microsoft OneDrive preferably. To fix the problem, you can try to disable the add-ins or try to start Word in Safe Mode or repair Office. For more details, refer to the options given below.

Option 1 – Disable the Add-ins

Although add-ins enhance Microsoft Word, there are times when they can also cause problems that end up breaking Microsoft Word instead of improving it which is why you have to disable them. Refer to the following steps to do so:

• Open Microsoft Word and then click on File.
• After that, select Options from the menu and then click on Add-ins.
• From there, you’ll see Manage: Com Add-ins as well as a button that says Go.
• Now click on the Go button and wait for a couple of seconds for a new window to appear.
• In the newly opened window, uncheck all the Add-ins and click on OK.
• Restart Microsoft Word and check if the “Template_fields” error is now fixed or not.

Option 2 – Try starting Word in Safe Mode

You might also want to try rebooting Microsoft Office in Safe Mode as it is one of your best shots in finding out whether the problem is internal or external. However, if the problem does not appear after you reboot Microsoft Word in Safe Mode, then there is a possibility that the problem is with Microsoft Office itself. On the other hand, if the problem persists, then it could be a deeper issue.

• First, start Microsoft Word in Safe Mode.
• Next, tap and hold the Ctrl key on your keyboard and open the Word document.
• After that, you should see a dialog box. Click on Yes and see if Microsoft Word opens in Safe Mode.
• Alternatively, you can open the search box and then type “winword.exe /safe” and hit Enter.

Option 3 – Try repairing Microsoft Office

If the first two options didn’t work, then you might want to try repairing Microsoft Office without getting rid of it. In most cases, this usually works in fixing any problems and returns the program back to its default state. To repair Microsoft Office, follow the steps below.

• Right-click on the Start Menu button and select Apps and Features.
• Next, scroll until you see the Microsoft Office program you want to repair and then select the Modify option.
• After that, follow the options to repair Microsoft Office and then restart your PC and see if the “Template_fields” error is no longer present.

In case you don’t know, Microsoft hooks up every machine that is running Windows 10 with an Advertising ID which helps them in providing Windows 10 users with relevant ads. These ads are delivered to users in the Action Center, Start Menu as well as the ads inside the UWP Applications. What makes these advertisements relevant is that they keep track of your browsing trends, likes and dislikes, with the help of the Advertising ID. However, if you are not fond of advertisements and you do not want this feature of Microsoft to track your usage, worry not for you actually have the option to disable targeted ads on your Windows 10 computer by turning off the Advertising ID. And you can do that during Windows 10 Setup or using the Group Policy Editor. For more details, refer to the instructions provided below for each one of the methods.

Option 1 – Turn off Advertising ID during Windows 10 setup

If you are about to install Windows 10, then during the installation process, your computer boots into the Install and Configure Windows 10 screen with Cortana that assist you during the setup. Once you reach the last page which is “Choose privacy settings for your device”, you will see the Advertising ID of your computer. Under the Advertising ID, you have to disable or toggle off the “Apps can use advertising ID to provide more personalized advertising in accordance with the privacy policy of the app provider” option. After you disable it, click on the Accept button to proceed with the installation. After that, the copy of your Windows 10 you are using will have the Advertising ID disabled by default.

Option 2 – Turn off Advertising ID via Group Policy Editor

• First, tap the Win + R keys to launch the Run utility.
• Then, type “gpedit.msc” in the field and click OK or tap Enter to open the Group Policy Editor.
• Next, navigate to this group policy setting: Computer Configuration > Administrative Templates > System > User Profiles
• Now double click on the “Turn off the advertising ID” option and set the radio button to Enabled. Once you do, you will see the following description on your screen:

“This policy setting turns off the advertising ID, preventing apps from using the ID for experiences across apps. If you enable this policy setting, the advertising ID is turned off. Apps can’t use the ID for experiences across apps. If you disable or do not configure this policy setting, users can control whether apps can use the advertising ID for experiences across apps.” Note that setting the radio button to Enabled or Not Configured will turn off the data collection of the Advertising ID.

• Finally, exit the Group Policy Editor and then restart your computer to apply the changes made successfully.

Microsoft Edge may be about to win a lot of fans by introducing a new feature that it says could prevent one of the most annoying things about being online. A new update to the browser suggests it is looking at a way to block auto-playing videos by default when a user navigates to a website. People spotted a new entry to the Microsoft Edge Canary browser where the company tries out its in-progress updates, that suggests auto-playing videos may have had their day at last. The new addition, for Mac, Windows, and Linux systems, is called “Autoplay Limit Default Setting”, with the description suggesting that Microsoft Edge would set the media autoplay setting to "Limit" as a default - stopping videos from starting up when a user lands on a website. Currently, Edge offers two options for users to control media autoplay - "Allow" (the current default setting), where all videos on a website will play automatically with sound, and "Limit", where media won’t be autoplayed on sites that a user has previously visited. It appears that Microsoft is looking to test the feature in Canary before rolling it out to a wider user base - as blocking autoplaying videos can cause issues for some websites. The same Canary entry also hints at a future "Block" option, which would presumably stop any videos or media from playing when a user lands on a website. However, this feature, which is also listed as being available for Mac, Windows, and Linux systems, doesn't appear to be enabled as yet. If you would like to read more helpful articles and tips about various software and hardware visit errortools.com daily.

If you are in the process of booting up your computer but suddenly encountered an error saying, “The Boot Configuration Data for your PC is missing or contains errors” with an error code of 0xc0000454, read on as this post will help you resolve the problem. The error code 0xc0000454 occurs when you boot your computer and when the Windows Boot Manager encounters an issue with the Boot Configuration Data or BCD. The error code 0xc0000454 (STATUS_INSUFFICIENT_NVRAM_RESOURCES) signifies that there are no sufficient NVRAM or Non-Volatile Random Access Memory resources to complete the API. NVRAM is a component of the system based on the software that stores the Boot Configuration Data in an operating system. Usually, a simple restart can resolve the problem. However, if you’ve already done that and it’s of no use, then there are other potential fixes you can check out to troubleshoot the problem. To resolve the error code 0xc0000454, here are some potential fixes that should help:

Option 1 – Try to repair corrupted BCD

As mentioned, the error could also be due to corruption in BCD, and to fix it, you can use Bootrec.exe – a built-in command-line tool used to troubleshot issues related to boot up and Windows Startup. Before you run this tool, make sure that you have inserted a bootable USB or DVD into your computer. Once you have that covered, follow these steps:

• You need to go to the Advanced Startup Options.
• Then click on Troubleshoot.
• Next, select the Advanced Options and then Command Prompt.
• Once Command Prompt has been pulled up, enter each one of the following commands and in the sequence that they are given to rebuild BCD files and repair MBR files:
  • Bootrec /Fixmbr
  • Bootrec /FixBoot

• After you execute the commands given above, you should see a confirmation message that says, “The operation completed successfully”.
• Now type the “Bootrec /RebuildBCD” command to rebuild BCD.
• Finally, close Command Prompt and then restart your computer to successfully apply the changes made.

Option 2 – Try to run the Automatic Repair Utility

You might also want to use Automatic Repair in fixing the error. To do so, follow the steps below.

• You can start by creating and booting from a bootable Windows 10 USB Stick.
• After that, click on Repair your computer located on the bottom left corner when you are on the initial Windows Startup screen.
• Next, click on Troubleshoot, and then on the other screen, click the Startup Repair option.
• Now select the operating system you want to repair. Once you do that, it will start to repair your operating system. Wait until the process is completed and then check if the problem’s now fixed.

Option 3 – Disable the Secure Boot in the BIOS

Disabling the Secure Boot in the BIOS settings is definitely recommended to resolve the error. To disable Secure Boot, here’s what you have to do:

• First, boot your computer into Windows 10.
• Next, go to Settings > Windows Update. From there, check if there is anything that you have to download and install if you see any available updates. Usually, OEMs send and update the list of trusted hardware, drivers, and operating systems for your computer.
• After that, go to the BIOS of your computer.
• Then go to Settings > Update & Security > Advanced Startup options. If you click on Restart Now, it will restart your computer and give you all the advanced options.
• Next, select Troubleshoot > Advanced Options. As you can see, this screen offers you further options including System restore, Startup repair, Go back to the previous version, Command Prompt, System Image Recovery, and UEFI Firmware Settings.
• Select the UEFI Firmware Settings which will take you to the BIOS.
• From there, go to the Security > Boot > Authentication tab where you should see Secure Boot. Note that every OEM has its own way of implementing the options so it varies.
• Next, set Secure Boot to Disabled and set Legacy Support to On or Enabled.
• Save the changes made and exit. Afterward, your computer will reboot.

Option 4 – Try to reset the BIOS

If updating the BIOS didn’t help in fixing the error, you can try to reset the BIOS instead.

• Start your computer and tap the F10 key during the booting process to enter the BIOS. If it does not work, you can try tapping the F1 or F2 key as well as the Del key.
• Once you’re already in the BIOS, tap the F9 key to get the prompt to RestoreLoad default configuration now for the BIOS.
• Next, click on Yes and then follow the next on-screen instructions that appear to set the BIOS back to its default settings.
• Once you’re done restoring the default settings of the BIOS, restart your computer and then check if it now boots properly.

Recently, a lot of users experience issues after the Windows 10 v1903 upgrade and one of them is that the Cortana Web Preview is not functioning like it’s supposed to. Even though Microsoft has already replaced the unified search where you no longer have to use Cortana, it is still undeniably useful and is packed with some great features, one of which is the Web view. Each time you type a search query, it will open a web view where you can see the results using Bing. However, some users reported experiencing some issue wherein the web view does not show anything and appears to be broken and users have to click on the Open in Browser link. Thus, if you are one of the users who experience the same problem, then this post is for you – it will guide you on what you can do if the web preview in Cortana is not working on your Windows 10 device. To fix the Web Preview issue in Cortana, you can try to restart Cortana or reset it using the Windows Settings app or change the Search filter level. You could also try to run the Windows Store App troubleshooter or re-register or reinstall Cortana. For more details refer to the options provided below.

Option 1 – Try to restart the process of Cortana

There are times when the running process of Cortana might encounter an error and breaks a particular component of the whole service so the first thing you can do is to restart Cortana’s process in the Task Manager.

• Tap the Ctrl + Shift + Esc keys to open the Task Manager.
• Next, go to the Processes tab and look for Cortana’s entry.
• Once you find it, right-click on it and select the End task option.
• Afterward, open Cortana again and see if it fixes the web view problem or not.

Option 2 – Try changing the search filter level

The next thing you can do to fix the Web View is to change the search filter level. All you have to do is go to Settings > Search and change filter level and from there, modify the search filter level and then see if it fixes the problem.

Option 3 – Run the Windows Store App troubleshooter

The Windows 10 Store Apps Troubleshooter will help you in fixing the Web Preview problem in Cortana. This is a great built-in tool from Microsoft that helps users fix any app issues. To use the Windows Store Apps Troubleshooter, follow the steps below.

• Tap Win + I keys again to open the Windows Settings panel.
• Go to Update & Security and then go to Troubleshoot.
• Under the Troubleshoot section, on your left-hand side, scroll down to find Window Store Apps.
• Then click on the Run the troubleshooter option and follow the on-screen instructions and then see if it fixes the problem.

Option 4 – Try to reset Cortana via Settings

• Launch the Windows 10 Settings app and go to Apps > Apps & Features.
• Next, look for the entry of Cortana on the right-side panel and select it.
• After that, select the Advanced options and then select the Terminate button under the Terminate section.
• Once done, click on the Reset button under the Reset section.
• Restart your PC.
• After your computer boots, launch Cortana again and check.

Option 5 – Try to re-register and reinstall Cortana

If none of the options given above works, you must consider reinstalling Cortana.

• First, right-click on the Start button and click on the Windows Powershell (Admin) option from the list.
• Next, type the following command and hit Enter to execute it:

Set-ExecutionPolicy Unrestricted

• After that, execute this second command to reinstall Cortana:

Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}

• Restart your computer and check if the Web Preview in Cortana is now working.

There are instances when the Windows 10 installation needs interaction before it reaches the file process. And so if you suddenly encounter the Windows Update Installation Failure 0x80240020 error under the Windows Update History, then you need to get it fixed. When you encounter this kind of Windows Update Error, you will see an error message that says, “The operation did not complete because there is no logged-on interactive user”. This error also indicates the “WU_E_NO_INTERACTIVE_USER” code. To resolve this issue, in this post we’ll walk you through a couple of steps but before you get started, know that you don’t have to run any troubleshooter or delete any file just to fix this error since all you have to do is enable one option that can automatically login with your account and complete the installation for you. With that said, just make sure to only try running Windows Update once you’re told to do so. There are two ways you can enable the option that could resolve the Windows Update Installation Failure 0x80240020 error. One is via Settings while the second one is via Registry Editor.

Option 1 – via Settings

Step 1: Go to Settings > Accounts > Sign-in Options. Step 2: From there, toggle on the “Use my sign-in info to automatically finish setting up my device and reopen my apps after an update or restart” option. Step 3: After that, it will make sure that the interaction part is removed from the Windows Update process. Note: If your device is joined in a domain or if some work or email policies are applied to your device by your company or organization, then you wouldn’t be able to see this option in Settings and that’s where the Registry Editor comes in. Just make sure that you’re logged in as an administrator and that you create a System Restore Point first since registry hacks are sensitive and could highly impact how your computer behaves or functions. Once you have that covered, follow the steps below.

Option 2 – via Registry Editor

Step 1: In the Start search, type “Regedit” and hit Enter to open the Registry Editor. Step 2: Navigate to the following registry key:

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionWindowsUpdateOSUpgrade

Note: If the above-given registry key does not exist, you can simply create it. All you have to do is right-click on the WindowsUpdate key and then select the New Key option and type “OSUpgrade” as its name. Afterward, create a new DWORD (32-bit) Value and name it “AllowOSUpgrade” and set its value to 0x00000001. Step 3: Restart your computer and check if the error is now fixed. And then try to update your Windows 10 computer again and while you’re at it, make sure that you’re around your computer to interact with the prompts needed to complete the installation process.

Error code 0xc000021a - What is it?

Error code 0xc000021a occurs when the system is unable to start or there’s a failure in critical system processes. Normally, it would take about several seconds for the system to boot and while on the startup process, error code 0xc000021a may take place to block the system to boot up. Users will get a blue screen of death (BOSD) when this error occurs. When upgrading to Windows 10, be careful; you might encounter other error messages such as error code 8007002c. 

Solution

Error Causes

There are several reasons why error code 0xc000021a occurs. It is important to have a full understanding of what caused the blue screen of death before attempting to fix the error by yourself. See below for a few common causes:

• Computer malware has infiltrated your device.

• Important files such as Winlogon.exe and Csrss.exe are damaged. Winlogon.exe file is responsible for handling the login and logout processes while Csrss.exe is a vital part of Microsoft Client or Server ‘Runtime Server Subsystem’. Once one of these files is damaged or deleted, a stop error will occur.

• When there are mismatched system files installed or system upgrading process failed or still incomplete.

• Premature unloading of Wbemprox.dll

• Newly installed third-party software is not compatible with the operating system.

• There are corrupted, outdated, or incorrectly configured device drivers.

• There’s insufficient space in the system partition. Once the system partition is full, certain errors such as error code 0xc000021a will manifest.

• Windows registry is corrupted or damaged due to a software or system change. This means there are registry entries that are not cleared after uninstalling an application.

Further Information and Manual Repair

In fixing error code 0xc000021a, you might want to try and manually do so. Manual repair methods can give users effective and efficient solutions, addressing the root problems in relation to Windows error codes. Once the manual repair method is correctly implemented, users will be able to resolve issues immediately. However, there might be instances when a Windows professional is needed. In such cases, seek help from a certified Windows expert or you might want to consider using an automated tool whenever necessary.

Method One: Convert the Drive or Partition from NTFS to GPT

In order to fix Error code 0xc000021a in Windows 10, you might need to convert the partition or drive from NTFS to GPT. See below for the procedure: 1. Shut down your device then put in the Windows installation USB key or DVD. 2. Boot your device to the USB key or DVD in UEFI mode. 3. Inside the Windows Setup, open a Command Prompt window by pressing Shift + F10. 4. Type diskpart in the Command Prompt window to open the diskpart tool. 5. Type list disk to identify which drive to reformat. 6. Select which drive to reformat by typing select disk in the command prompt. Afterward, type clean then hit Enter. Once done, type convert gpt to be able to convert the drive from NTFS to GPT. Finally, type exit and press Enter. You can now close the Command Prompt window. 7. Once the partition or drive is converted from NTFS to GPT, the user can now continue the Windows Setup installation. NOTE: Select Custom in choosing which installation type to use. The drive will then appear as a single area of unallocated space. Choose that unallocated space then select Next. At this point, Windows will now begin the installation.

Method Two: Fix System File Errors

There are times when system files get corrupted or damaged which will result in system failure. If this is the case, you can use a Windows free tool to repair corrupted or damaged system files. 1. Right-click on the Start button then selects Command Prompt (Admin) from the list to open a Command Prompt window. 2. Once the Command Prompt appears, type sfc /scannow then hit Enter. Wait until the process completes. If the process is completed and it doesn’t report any error or issues that remain unsolved, you might want to employ the next method.

Method Three: Reset Windows 10

Resetting Windows will delete all software and user accounts installed in the operating system and will reinstall a fresh Windows. 1. Boot your device using a Windows installation USB key or DVD. Select Repair your computer to locate the Troubleshoot option. Afterward, choose Reset this PC. NOTE: If the device is able to boot the system, you can reset Windows without using a Windows installation USB key or DVD. You just have to boot the device then navigate to Settings in the Start button. Choose Update & Recovery then select Recovery found on the left pane. Choose Reset this PC option then select Go back to an earlier build and Advanced startup. Select Get Started button found in the Reset this PC tab. 2. Depending on your device’s condition, you can either select Keep my files or Remove everything. Both options will remove all applications installed in the device and will revert to default settings. 3. Choose either Just remove my files or Remove files and clean the drive depending on the situation. If you choose the Remove files and clean the drive option, the procedure will take longer as it will erase all the files permanently. In this case, deleted files cannot be recovered. However, if you don’t want to remove files permanently, select Just remove my files. 4. Once you’ve decided how to reset your system, click on Next once the Warning screen appears. Afterward, choose Reset once prompted. When the process completed, click on Continue.

Method Four: Download an Automated Tool

Can’t seem to put up with the long and technical manual repair process? You can still fix this error by downloading and installing a powerful automated tool that will surely get the job done in a jiffy!