Question
Issue: How to fix KB5012643 fails to install in Windows 11?
Hello. I tried to install the KB5012643 update on my Windows 11 computer but it failed. Is there anything I can do to be able to download this update?
Solved Answer
Microsoft regularly releases updates for the Windows operating system, which contain bug fixes, new features, and security patches. It is important to keep Windows up-to-date to avoid stability issues and protect against vulnerabilities that can be exploited by cybercriminals.
The latest update for Windows 11 is KB5012643, which addresses various problems such as video subtitles being partially cut off, memory leaks, and issues with Windows going into BitLocker recovery after a servicing update. However, some users have reported difficulty in installing this update.
It is not clear why KB5012643 is failing to install in Windows 11, but common reasons for update failures include interference from third-party security software, corrupted files, and malfunctioning Windows services or update components. In this guide, we will provide 7 steps to help fix the issue of KB5012643 not installing in Windows 11.
Keep in mind that manual troubleshooting can be time-consuming. You can use an automatic maintenance tool like RestoroMac Washing Machine X9 to help fix most system errors, BSODs,[1] corrupted files, registry[2] issues, or clear cookies and cache.[3] Otherwise, follow the step-by-step instructions provided in the guide.
Solution 1. Repair Corrupted System Files
Use Command Prompt commands to repair system file corruption:
- Open Command Prompt as administrator
- Use the following command and press Enter:
sfc /scannow
- Reboot your system
- If SFC returned an error, then use the following command lines, pressing Enter after each:
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth
Solution 2. Disable Third-Party Security Software
Sometimes antivirus software can block legitimate processes mistakenly. You should try disabling your antivirus and trying to run the update again.
Solution 3. Run Windows Update Troubleshooter
- Click the Windows button and select Settings
- Select System from the left pane, then scroll down on the right pane, and click on Troubleshoot
- Click on Other troubleshooters
- Locate the Windows Update troubleshooter and hit the Run button
Solution 4. Restart Windows Services
- Type services in the search bar and launch the Services utility
- Find Windows Update in the list
- Double-click on it, set the Startup type to Automatic, and click Apply
- Now click on Restart the Service
- Do the same with Background Intelligent Transfer Service
Solution 5. Reset Windows Update Components
- Open the Command Prompt as an Administrator
- Type the following commands one by one and press Enter after each:
net stop bits
net stop wuauserv
net stop cryptsvc
Del “%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat”
Ren %Systemroot%\SoftwareDistribution\DataStore DataStore.bak
Ren %Systemroot%\SoftwareDistribution\Download Download.bak
Ren %Systemroot%\System32\catroot2 catroot2.bak
sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
cd /d %windir%\system32
regsvr32.exe atl.dll
regsvr32.exe urlmon.dll
regsvr32.exe mshtml.dll
regsvr32.exe shdocvw.dll
regsvr32.exe browseui.dll
regsvr32.exe jscript.dll
regsvr32.exe vbscript.dll
regsvr32.exe scrrun.dll
regsvr32.exe msxml.dll
regsvr32.exe msxml3.dll
regsvr32.exe msxml6.dll
regsvr32.exe actxprxy.dll
regsvr32.exe softpub.dll
regsvr32.exe wintrust.dll
regsvr32.exe dssenh.dll
regsvr32.exe rsaenh.dll
regsvr32.exe gpkcsp.dll
regsvr32.exe sccbase.dll
regsvr32.exe slbcsp.dll
regsvr32.exe cryptdlg.dll
regsvr32.exe oleaut32.dll
regsvr32.exe ole32.dll
regsvr32.exe shell32.dll
regsvr32.exe initpki.dll
regsvr32.exe wuapi.dll
regsvr32.exe wuaueng.dll
regsvr32.exe wuaueng1.dll
regsvr32.exe wucltui.dll
regsvr32.exe wups.dll
regsvr32.exe wups2.dll
regsvr32.exe wuweb.dll
regsvr32.exe qmgr.dll
regsvr32.exe qmgrprxy.dll
regsvr32.exe wucltux.dll
regsvr32.exe muweb.dll
regsvr32.exe wuwebv.dll
netsh winsock reset
net start bits
net start wuauserv
net start cryptsvc
- Wait for the process to finish and restart your PC
Solution 6. Install the Update Manually
If automatic download would not succeed, we recommend trying to download and install the update manually.
- Go to the official Microsoft Update Catalog website
- Type the KB number KB5012643 into the search bar, and press Enter or click Search
- You will find many different versions on the update – you need to find the one that matches your PC specs and Windows version (as a home user, ignore Windows server versions)
- After picking the correct version, click the Download button and proceed with the on-screen instructions
- Restart your system once done.
Solution 7. Repair Install Windows
- Visit the official Microsoft website to download Windows 11 Installation Media
- Run the Media Creation Tool and select Create Installation Media for another PC
- Select your USB drive
- Let the Process complete of writing the Installation files to the USB drive
- Click Finish
- On the PC you wish to upgrade, Press Windows + E to open the File Explorer
- Open the Removable drive and click Setup.exe
- Accept the license terms on the next screen
- Confirm the Upgrade options – Files, apps and Settings are kept
- Click Install, and the upgrade should start
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Gabriel E. Hall is an expert troubleshooter who has been working in the information technology industry for years.
- ^ Chris Hoffman. Everything You Need To Know About the Blue Screen of Death. Howtogeek. Technology Magazine.
- ^ Tim Fisher. What Is the Windows Registry?. Lifewire. Software and Apps.
- ^ Difference between Cache and Cookies. Geeksforgeeks. IT Education.
