Why is my Windows 10 update version 21H2 stuck at 100%?

For the most part, Windows updates happen silently in the background, only installing after a prompt or when you shut down your PC. However, there are occasions when the update system needs a helping hand. If your Windows update runs into an error, you aren’t alone. This setback has been a widespread issue for the OS since Microsoft dropped their quality assurance team and relied on users through preview builds, feedback, and more.

Perhaps your Windows 10 downloaded half of the update before deciding it doesn’t want to stay connected to the server. Other times, the OS fancies doing its own thing for a while, slowing your eagerly awaited update to a crawl. Other than those two situations, the OS may run into an installation bug or data problem that stops it in its tracks.

If Windows Update freezes or gets stuck, there are several steps to try. Here’s the process—in order of importance.

#1: Run Windows Update Troubleshooter

The first step is the safest way to resolve Windows 10 Update issues. The process will automatically scan for and detect problems within your system, which can take a few minutes to complete.

1. Open the “Start menu” and click on “Settings.”
   
2. Next, click on “Update & Security.”
   
3. Then, click on “Troubleshoot” and then “Additional troubleshooters.”
   
4. From there, choose “Windows Update” and then “Run the troubleshooter.”
   
   

The troubleshooter should hopefully clear up the problems causing Windows Update to get stuck.

#2: Delete Files in Software Distribution

If the troubleshooter does not resolve the update problem, it’s time to interact with your computer’s system settings. It shouldn’t cause any damage to your PC. You’ll only delete temporary Windows Update files, but it is recommended that you set up a System Restore point before going any further.

1. Open the “Start menu,” then type “cmd” into the “Search box,” and then select “Command Prompt” and choose “Run as administrator.”
   
   
2. Next, stop “Windows Update Service” and “Background Intelligent Transfer Service.” There are two commands you’ll need to type into the command prompt, one at a time. Press “Enter” after you type each one.

net stop wuauserv
net stop bits

3. Next, you’ll need to delete the files in the “C:/WindowsSoftwareDistribution” folder. Select all files, then press “Delete.” If you can’t delete the files because they’re in use, you’ll need to restart your PC. Turn off the two Windows Update services and then try to delete the files again.

4. Once the folder has been emptied, restart your computer or manually turn on the Windows Update services. To do this, bring up the command prompt (admin) and type:

net start wuauserv net start bits

5. Now, run “Windows Update,” and you’ll find that your PC needs to download several updates, which can take up to a few hours, depending on your system and connection.

Once the updates have been installed, Windows will schedule a restart time, although you can always restart immediately.

#3: Make a Quick-Fix Batch File

The following fix is a convenient way to execute several commands in one swoop. The script’s success level is subject to Windows changes through previous updates and the current condition of your OS. It may or may not work for you. Use it at your own risk!

The batch file (shown below) does the following, in exact order:

1. Changes the attributes of “system 32catroot” folder and the files within it
2. Stops the Windows Update Service (wuauserv), Cryptographic services (CryptServ), and Background Intelligent Transfer Service (BITS)
3. Renames the “system 32catroot” folder to “system32catroot.old”
4. Renames the temporary Windows Update files folder “WindowsSoftwareDistribution” to “WindowsSoftwareDistribution.old”
5. Rename the “All UsersApplication DataMicrosoftNetworkDownloader” folder to “All UsersApplication DataMicrosoftNetworkDownloader.old”
6. Restarts BITS.
7. Restarts CryptSvc.
8. Restarts wuauserv.

To run the batch file, copy the following script into notepad and save it to the Windows Desktop as “UpdateFix.bat”to make it easy to find and to delete it when done. Right-click the batch file and select “Run as Administrator.” Restart Windows after the script completes successfully.

@ECHO OFF  echo This script is intended to stop Windows Update being COMPLETELY and UTTERLY rubbish  echo.  PAUSE  echo.  attrib -h -r -s %windir%system32catroot2  attrib -h -r -s %windir%system32catroot2*.*  net stop wuauserv  net stop CryptSvc  net stop BITS  ren %windir%system32catroot2 catroot2.old  ren %windir%SoftwareDistribution SoftwareDistribution.old  ren "%ALLUSERSPROFILE%application dataMicrosoftNetworkdownloader" downloader.old  net Start BITS  net start CryptSvc  net start wuauserv  echo.  echo Windows Update should now work properly. Thanks Microsoft.  echo.  PAUSE

The script above allows Windows to create new update folders and data to eliminate file corruption or incompatibilities.

#4: Identify Windows 10 Update Error Codes and Fix The Reported Issues

If none of the above options fixed your Windows Update problem, it is time to decipher the codes to discover the cause of failure—hopefully! Most update issues return an error code that identifies what caused the update to fail. The following table below provides the most common Windows 10 Update error codes and the possible solutions to fix them.

#5: Use System Restore

If your computer still isn’t responding when installing updates, you can run a System Restore. This action will revert your PC to an earlier point in time.

1. To access System Restore, type “System Restore” into the “Search bar” and select “Create a restore point.”
   
2. From “System Restore,” you can pick an appropriate point to revert to.
   
   

Once you’ve returned to an earlier restore point, try installing the updates again as usual.

#6: Use the Windows 10 Recovery Tool

If your Windows 10 device still isn’t updating or is still frozen on updating, then you’ll want to boot into the Windows 10 Recovery Tool and fix the drive or roll back to a previous restore point. If your device isn’t responding, then you’ll need to download this using another.

1. If you haven’t already, start by downloading Windows Media Creation Tool, it’s also used for restoring/fixing your existing Windows OS.
   
2. Next, plug in the USB with the recovery tool on it.
   
3. Now, restart your device and then click either “F8“, “F10“, “F12“, or “Del” to enter the BIOS/UEFI, it varies based on the manufacturer.
4. Next, look for “Boot” or “Boot Order” and click on it. Some BIOS keep it under “System.”
5. Then, change the boot order so the Windows Media Creation Tool boots up first, you can usually just use the arrow keys to change the boot order.
6. When the tool loads, select your language/preferences and click on “Next.”
7. Now, select “Repair your computer” from the options.
8. Then, start by trying to repair your disk with the sfc command, enter “sfc /scannow” without quotes and hit “Enter” in the command prompt.
   
9. If that doesn’t work, you’ll want to use a previous restore point and roll back to it. Windows creates them by default when you download new programs, so you should have several to choose from

Take Away

In closing, Windows 10 can sometimes run into problems when updating. Luckily, you know what to do now if that scenario happens. Start with the least complicated and permanent issue before resorting to previous restore points and more drastic solutions.

Do you know of any other ways to fix a Windows 10 update that’s stuck or frozen? Feel free to share it in the comments below.

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