How to fix KB5021234 fails to install in Windows 11?

Question

Issue: How to fix KB5021234 fails to install in Windows 11?

Hello. I tried to install the new KB5021234 update for Windows 11 but the process fails every time I try. Is there anything I can do?

Solved Answer

On December 13, 2022, Microsoft released a new security update for Windows 11 – KB5021234. This update addresses an issue that affects remote networks, specifically an issue that prevents the reconnection to remote networks using DirectAccess. This issue arises when the decryption of a certificate's private key fails, which may be caused by encrypting the DPAPI master key with a wrong value. This failure may also affect VPNs and other 802.1 certificate-based authentications.

However, some people may have issues when trying to install the newest update. There are user reports that KB5021234 fails to install. It is unknown why exactly this may be happening. However, most of the time, Windows updates fail to install because of corrupted files, third-party antivirus interference, or malfunctioning Windows services.

In this guide, you will find 6 steps that should help you fix KB5021234 fails to install in Windows 11. If you want to avoid a lengthy manual troubleshooting process, you can use a maintenance tool like ReimageMac Washing Machine X9. It can automatically fix most system errors, BSODs,[1] corrupted files, registry[2] issues, or clear cookies and cache.[3] Otherwise, follow the step-by-step instructions below.

How to fix KB5021234 fails to install in Windows 11

Method 1. Fix Corrupted System Files

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Use Command Prompt commands to repair system file corruption:

  • Open Command Prompt as administrator
  • Use the following command and press Enter:
    sfc /scannow

Fix Corrupted System Files

  • 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

Method 2. Disable Third-Party Security Software

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Sometimes antivirus software can block legitimate processes mistakenly. You should try disabling your antivirus and trying to run the update again.

Disable Third-Party Security Software

Method 3. Run the Update Troubleshooter

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • 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

Run the Update Troubleshooter

  • Locate the Windows Update troubleshooter and hit the Run button

Method 4. Restart Windows Services

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • 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

Restart Windows Services

  • Do the same with Background Intelligent Transfer Service

Method 5. Reset Windows Update Components

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • 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

Reset Windows Update Components

  • Wait for the process to finish and restart your PC

Method 6. Repair Install Windows

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • 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

Repair Install Windows

  • 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

Repair your Errors automatically

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Reimage - a patented specialized Windows repair program. It will diagnose your damaged PC. It will scan all System Files, DLLs and Registry Keys that have been damaged by security threats.Reimage - a patented specialized Mac OS X repair program. It will diagnose your damaged computer. It will scan all System Files and Registry Keys that have been damaged by security threats.
This patented repair process uses a database of 25 million components that can replace any damaged or missing file on user's computer.
To repair damaged system, you have to purchase the licensed version of Reimage malware removal tool.

Prevent websites, ISP, and other parties from tracking you

To stay completely anonymous and prevent the ISP and the government from spying on you, you should employ Private Internet Access VPN. It will allow you to connect to the internet while being completely anonymous by encrypting all information, prevent trackers, ads, as well as malicious content. Most importantly, you will stop the illegal surveillance activities that NSA and other governmental institutions are performing behind your back.

 

Recover your lost files quickly

Unforeseen circumstances can happen at any time while using the computer: it can turn off due to a power cut, a Blue Screen of Death (BSoD) can occur, or random Windows updates can the machine when you went away for a few minutes. As a result, your schoolwork, important documents, and other data might be lost. To recover lost files, you can use Data Recovery Pro – it searches through copies of files that are still available on your hard drive and retrieves them quickly.

 

About the author
Gabriel E. Hall
Gabriel E. Hall - Passionate computer expert

Gabriel E. Hall is an expert troubleshooter who has been working in the information technology industry for years.

Contact Gabriel E. Hall
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