KB5012643 Update Installation Issues on Windows 11

Microsoft took years to upgrade the Windows operating system from Windows 10 to Windows 11. Post-releasing Windows 11 updates, users have been complaining about numerous glitches regarding the latest Windows OS. The KB5012643 update installation issue on Windows 11 is one of the most recurring problems since Windows 11 hit the floor.

Many users are getting numerous troubles while trying to install the KB5012643 update. You might not skip this particular update because this patch has a feature and a few security improvements for Windows functionalities.

On the other hand, the KB5012643 update fails to get installed even though Safe Mode is triggered. Among the reasons leading to the KB5012643 update installation issue on Windows 11, common Windows Update inconsistency, disabled Windows Update service dependency, and corrupted update components are noticeable.

Let’s find out how you can install the KB5012643 update for Windows 11 after overcoming all the appearing warnings.

Try Installing the KB5012643 Update again

Chances are there that the KB5012643 update on Windows 11 was unable to get installed due to temporary glitches. You can attempt installing the update in the following way through Windows Update.

Here’s how you can update your Windows 11:

  • Go to the Settings app by pressing the Windows and I keys at the same time.
  • After that, click the Windows Update option from the left panel of the window.
  • Notice the ‘Check for updates’ at the right panel. Once Windows completes the scan, the KB5012643 update should be available for download and installation.
  • Choose the Download and Install option below the update.
  • Check if your device downloads and installs it.

Once you have installed it, choose the option named Restart Now. This should resolve your issues with the KB5012643 update on Windows 11.

Get Help from Windows Update Troubleshooter

Windows’ built-in troubleshooter helps mitigate errors if they are not too critical. Windows Update Troubleshooter can automatically locate and fix issues. Additionally, the troubleshooter has been improved with the Windows 11 version.

Run the troubleshooter to inspect whether it can fix the KB5012643 update install issue:

  • Use the Windows+R combination to open a Run box.
  • Enter ‘control’ in the ext box of the Run dialog box and click the Ok button. This launches the Control Panel on your Windows 11 PC.
  • You might come across a User Account Control prompt, and you might have to click the Yes option.
  • Look for ‘troubleshoot’ option once the Control Panel appears. Click the Troubleshooting category from the window.
  • Next, head towards the System and Security option. Choose the option, ‘Fix difficulties with Windows Updates’ under the Troubleshooting tab.
  • Click the Next button, and you must wait for the scan to complete.
  • If any solution or fix becomes available, click the ‘Apply this fix’ option.

Repeat the steps several times to apply all the fixes and eliminate the KB5012643 update installation issue. Restart your computer, and then try installing the problematic update on your PC.

Enable Windows Update Service Dependencies

Windows Updates depend on several other services to run successfully. These services should be enabled when Window Update components require them. The following services are needed for WU components to work properly:

  • Background Intelligent Transfer Service or BITS
  • TrustedInstaller
  • Cryptographic Services or CryptSvc

All you have to do is to set these services to Auto so that the KB5012643 update can be installed. Here’s how you can do so:

  • Launch a Run box.
  • Type in “cmd” in the text box of the Run dialog box. Instead of pressing the Enter key only, hold the Ctrl, Shift, and Enter keys simultaneously to open an elevated Command Prompt window.
  • Click Yes to grant permission once the User Account Control pops up.
  • Next, you have to enter the following commands in the Command Prompt window:
    1. SC config wuauserv start=auto
    2. SC config bits start=auto
    3. SC config cryptsvc start=auto
    4. SC config trustedinstaller start=auto
  • After you have executed all the commands successfully, you need to restart your Windows 11 PC.

Finally, you can attempt installing the KB5012643 update as usual. If the issue still persists, move on with the following fixes.

4. Run a DISM Scan

DISM scans are pretty reliable when you need to resolve corrupted update issues. Additionally, the DISM commands will activate a few required features for Windows Update components.

If you are still stuck with the KB5012643 update installation issue, then you should try running a DISM scan. Follow the instructions below to proceed:

  • Start with launching a Command Prompt window with admin properties. You can press the Windows key and start typing ‘terminal’ to search for a terminal or Command Prompt. Select the ‘Run as administrator’ for an elevated terminal.
  • Next, you have to execute the following 3 commands. Don’t forget to press Enter after you finish typing every command in the Command Prompt window.
    1. dism/online /enable-feature /featurename:netfx3 /all
    2. dism/online /enable-feature /featurename:WCF-HTTP-Activation
    3. dism/online /enable-feature /feature-name:WCF-NonHTTP-Activation

Now, you need to restart your PC before you try installing the erroneous Windows Update named KB5012643. You can even attempt an SFC scan to eliminate the update installation menace.

To run an SFC scan, you have to run an elevated Command Prompt window again. After that, you have to copy and paste the following command: SFC /scannow. Immediately press the Enter key to execute the command and it might take a while.

Windows will scan every system file one by one, and you have to keep patience. Once the SFC scan completes, you need to restart your Windows PC. Then, you have to check whether your PC installs the KB5012643 update.

5. Reset WU Components

Corruption with Windows Update components can delay the installation of the KB5012643 update on Windows 11. Beforehand, you have set all those WU components to Auto.

Now, resetting each WU component might address the issue. Thereafter, you might be able to install the KB5012643 update.

Here’s what you need to do to reset Windows Update components:

  • Open an elevated Windows terminal or Command Prompt window.
  • Copy and paste the following 4 commands one by one:
    1. net stop wuauserv
    2. net stop cryptsvc
    3. net stop msiserver
    4. net stop bits
  • Make sure that you press the Enter key after you type each and every command. Next, you have to enter two more commands for emptying and renaming two folders named SoftwareDistribution and Catroot2.

Here are the two commands:

  1. ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
  2. ren C:\Windows\System32\catroot2 catroot2.old
  • These commands make space for a healthy and new equivalent to store new Windows Update components. Afterwards, you need to enable those services that you disabled previously.

Run the following commands:

  1. net start wuauserv
  2. net start cryptsvc
  3. net start msiserver
  4. net start bits

Now, you can restart your Windows PC. Then, you have to try reinstalling the KB5012643 update and test if the issue has disappeared.

What else can You Do to Eliminate the KB5012643 Update Installation Issue?

Users suggested system restore, startup repair, and booting to Safe Mode to install the KB5012643 update on Windows 11. You can try these solutions to check if they make any difference.

Otherwise, you can simply hide the KB5012643 update and wait for Microsoft to eradicate the bug with a competent update or patch. Hopefully, the guide helped you to deal with the KB5012643 update installation problem on Windows 11.