FIX: Update agent installer encountered unrecoverable error

by Radu Tyrsina
Radu Tyrsina
Radu Tyrsina
CEO & Founder
Radu Tyrsina has been a Windows fan ever since he got his first PC, a Pentium III (a monster at that time). For most of the kids of... read more
Affiliate Disclosure
  • When you get a notification that Windows Update Agent Installer encountered unrecoverable error it means that your system has encountered a serious problem while trying to update.
  • To keep your computer safe, you have to address this issue as soon as possible. We are exploring some options in the article below.
  • This article is part of a larger collection that focuses on Windows Update errors.
  • We encourage you to also take a look at our Windows 10 Troubleshooting Hub for complete guides on everything that you might want to fix on your computer.
windows update agent installer encountered unrecoverable error

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Keeping your computer up to date is vital not only to make sure you have the latest operating system fixes and security improvements but also to have an environment that runs efficiently.

Usually, the latest updates are automatically installed when rebooting your computer. However, manual updates are sometimes necessary. Unfortunately, users have sometimes reported a message saying that the Windows update agent installer encountered an unrecoverable error.

This has occurred especially after forcing Windows to check for updates trying to fix the process, or after manually updating the Windows Update Agent.

The bottom line is, the error is a failure to correctly run one of its normal operations by a system or application component. There are several recommended solutions to fix this and we’re going to discuss them.

How do I fix Windows update agent installer error?

1. Use a dedicated repair toolhow to update drivers

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2.Run the Windows Troubleshooterfix windows update with troubleshooter

  1. Open Settings > Update & Security.
  2. Click on Troubleshooter > go to Windows Update section.
  3. Click on Run the Troubleshooter.

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This is the simplest method to allow Windows to detect the problems and also to fix them. If the problem is not complicated (missing or corrupted registry files, for example), the system will find resources to solve the issue with no other intervention.

Otherwise, the process will also tell you if additional steps are necessary.

3. Run the System File Checkerfix windows update agent

  1. In the search bar, type cmd from the keyboard.
  2. Launch it as an administrator.
  3. In the command prompt window, type in sfc /scannow and press Enter.

This process may take several minutes and should detect and repair any issues with the registry files or system references.

It is very likely that running this command will not fix the Windows Update Installer Agent error but at least the log files will show where the problem is. You can then move on to another solution.

Note: If, for whatever reason, you can’t run Command Prompt as an administrator, try these solutions.

4.Run the DISM image repair tool

  1. Open Command Prompt as in the previous step and run as administrator.
  2. One by one, enter the following commands:
    • DISM /Online /Cleanup-Image /CheckHealth
    • DISM /online /cleanup-image /scanhealth
    • DISM /online /cleanup-image /restorehealth

The system should again repair any faulty file it can find. However, many users mentioned that they were able to run the process, it repaired some files, but the Windows Update Installer Agent error was still not fixed.

In this case, you should move on to another solution.

5. Reset Windows components manually

  1. In the search bar, type Services > Run as administrator.
  2. Find the Background Intelligent Transfer Service.update windows agent manually
  3. Right-click and choose Start.
  4. Then, open Command Prompt as before.
  5. Type the following commands:
    • net stop bits (press Enter)
    • net stop wuauserv (press Enter)
  6. Then type the following and, again, press Enter:
    • Del "%ALLUSERSPROFILE%Application DataMicrosoftNetworkDownloaderqmgr*.dat"
  7. Type the following command and press Enter:
    • cd /d %windir%system32
  8. At this point, you have to re-register the BITS files and the Windows Update files. So type the following commands and press Enter after each one:
    • 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
  9. Reset Winsock and press Enter:
    • netsh winsock reset
  10. Restart the BITS service and the Windows Update service:
    • net start bits
    • net start wuauserv

This is the default method to reset the Windows Update Agent and it should fix the problems. If it’s not helpful, there are a couple of other solutions that you can try.

6.Install a clean Windows image

  1. Gather your installation CD, product key, and anything necessary for a re-installation of the OS.
  2. Type Windows Security in the search bar > update agent installer error
  3. Go to Device performance& health.
  4. Scroll to Fresh Start > Additional info.
  5. Click on the Fresh Start button and follow the process. Reboot the device after the process is finished.

Troubleshooting Windows errors is never fun, but we hope that you found this article helpful. If you found another successful solution, please share it with the community in the section below.

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Frequently Asked Questions

  • The Windows Update Agent (WUA) is a Windows program that works in conjunction with Windows Server Update Services to support automated patch delivery and installation.

  • If you’re seeing this dreaded error, check out our extensive Windows Update error C80003F3 guide.

  • Normally, the Windows Update Agent is automatically updated every time you start your computer. Even more, you can set specific schedules for your system’s update process.

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