0xC80003FA Windows Update Error: How to Fix It

Run the Windows Update troubleshooter to fix the issue

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Key notes

  • The 0xC80003FA Windows Update error occurs if the internet connection is weak, you have corrupted Windows Update components or infected system files.
  • To fix it, you can run a Windows Update troubleshooter, run an antivirus scan or reset Windows Update components.
0xC80003FA Windows Update Error

If you have encountered a Windows Update error 0xC80003FA, it indicates a problem with the Windows Update service or its components.

In this guide, we will discuss some expert-tested methods to fix the issue right after explaining the causes.

What causes the Windows Update error 0xC80003FA?

There could be various reasons for this Windows update error; some of the common ones are mentioned here:

  • System files corrupted -If the Windows Update components have become corrupted, it could cause issues with the update process. Try resetting the components to fix it.
  • Third-party interference – Sometimes, security software and firewalls can interfere with the Windows update process, causing this error. Try disabling the antivirus temporarily.
  • Insufficient system memory -If your computer lacks enough resources, including disk space and memory, to perform the update process, it could cause this issue.
  • Malware infection – Malicious software on your system can disrupt the Windows Update process, preventing updates from being downloaded or installed. Run a deep scan using an antivirus tool.
  • Internet connectivity issues – If the internet connection is unstable or slow, it can prevent the Windows Update service from communicating properly with Microsoft’s servers.

Now that you know the causes of the problem, let us move to the solutions.

How can I fix the Windows Update error 0xC80003FA?

Before engaging in advanced troubleshooting steps, you should consider performing the following checks:

If these tweaks didn’t work, check out the detailed steps below.

1. Run the Windows Update troubleshooter

  1. Press Windows + I to open the Settings app.
  2. Go to Update & Security.0xC80003FA  Windows 10 Update & Security
  3. Click Troubleshoot, then Additional troubleshooters.Additional troubleshooters 0xC80003FA
  4. Locate Windows Update and click Run the troubleshooter.Run the troubleshooter
  5. Follow the on-screen instructions to complete the process.

2. Restart the Windows Update service

  1. Press Windows + R to open the Run dialog box.Services msc
  2. Type services.msc and click OK to open the Services app.
  3. Locate and right-click Windows Update and select Stop.Stop services Windows Update
  4. Once it is stopped, right-click Windows Update and choose Start.Windows Start

This will restart your Windows Update service, then try to rerun Windows updates.

3. Reset the Windows Update components

  1. Press the Windows key, type cmd, and click Run as administrator.Command Prompt Windows Run as Administrator
  2. Type the following commands to stop Windows Update, BITS & cryptographic services, and press Enter after every command:Start the services 0xC80003FA
    • net stop bits
      net stop wuauserv
      net stop appidsvc
      net stop cryptsvc
  3. To delete the qmgr*.dat files, copy & paste the following command and hit Enter:Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"
  4. To clear the Windows Update cache to allow Windows 10 to re-download the updates, type the following commands one by one and press Enter after every command:
    • rmdir %systemroot%\SoftwareDistribution /S /Q
      rmdir %systemroot%\system32\catroot2 /S /Q
  5. Copy & paste the following commands to reset the BITS and Windows Update service to the default security descriptor and hit Enter:
  6. Type the following command and press Enter: cd /d %windir%\system32
  7. To re-register the BITS files & the Windows Update-related dll files, copy & paste the following commands one after the other and hit Enter after every command:
    • regsvr32.exe /s atl.dll
      regsvr32.exe /s urlmon.dll
      regsvr32.exe /s mshtml.dll
      regsvr32.exe /s shdocvw.dll
      regsvr32.exe /s browseui.dll
      regsvr32.exe /s jscript.dll
      regsvr32.exe /s vbscript.dll
      regsvr32.exe /s scrrun.dll
      regsvr32.exe /s msxml.dll
      regsvr32.exe /s msxml3.dll
      regsvr32.exe /s msxml6.dll
      regsvr32.exe /s actxprxy.dll
      regsvr32.exe /s softpub.dll
      regsvr32.exe /s wintrust.dll
      regsvr32.exe /s dssenh.dll
      regsvr32.exe /s rsaenh.dll
      regsvr32.exe /s gpkcsp.dll
      regsvr32.exe /s sccbase.dll
      regsvr32.exe /s slbcsp.dll
      regsvr32.exe /s cryptdlg.dll
      regsvr32.exe /s oleaut32.dll
      regsvr32.exe /s ole32.dll
      regsvr32.exe /s shell32.dll
      regsvr32.exe /s initpki.dll
      regsvr32.exe /s wuapi.dll
      regsvr32.exe /s wuaueng.dll
      regsvr32.exe /s wuaueng1.dll
      regsvr32.exe /s wucltui.dll
      regsvr32.exe /s wups.dll
      regsvr32.exe /s wups2.dll
      regsvr32.exe /s wuweb.dll
      regsvr32.exe /s qmgr.dll
      regsvr32.exe /s qmgrprxy.dll
      regsvr32.exe /s wucltux.dll
      regsvr32.exe /s muweb.dll
      regsvr32.exe /s wuwebv.dll
  8. Type the following command to reset Winsock and press Enter:Reset  1
    • netsh winsock reset
      netsh winsock reset proxy
  9. Copy & paste the following commands to start Windows Update, BITS & cryptographic services, and press Enter after every command:Stop the services
    • net start bits
      net start wuauserv
      net start appidsvc
      net start cryptsvc
  10. Reboot your PC to confirm the changes.

So, these are the methods to fix the Windows Update error 0xC80003FA. If nothing worked for you so far, we suggest you perform a clean installation of Windows.

If you have questions or suggestions, feel free to mention them in the comments section below.

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