How to fix Windows update error 0x80070661?

Issue: I wanted to apply the newest updates for my Linux subsystem for Windows, but it failed with error code 0x80070661. I have been trying to install it several times but to no avail. Please advise, as I have never dealt with this before.

Solved Answer

Windows is a widely-used operating system that provides users with a rich set of features and functionalities. One of the features that Windows users can take advantage of is the Windows Subsystem for Linux (WSL). WSL is a compatibility layer that allows users to run Linux applications natively on Windows. This capability can help users utilize Linux applications without switching to a Linux operating system.

However, just like any other software, WSL must be updated regularly to ensure that it runs smoothly without any issues. Unfortunately, some users have encountered error code 0x80070661 when updating their Windows Subsystem for Linux.

The 0x80070661 error occurs when the Windows Update service encounters a problem while attempting to install the WSL update. The exact cause of the error is unclear, but it is believed to be related to issues with the Windows Update service or other system components.

To fix the 0x80070661 error, there are several solutions that users can try. One of the easiest solutions is to run the Windows Update troubleshooter. This tool can detect and fix many common issues with the Windows Update service.

Another solution is to manually download and install the WSL update from the Microsoft Update Catalog. Users can download the appropriate update for their system and then install it manually.

How to fix Windows update error 0x80070661?

0x80070661 error can be frustrating for users trying to update their Windows Subsystem for Linux. However, with the solutions mentioned above, users can quickly fix the error and continue to use the WSL feature without any issues. It is essential to keep WSL updated to ensure that it continues to work correctly and provide users with a smooth experience.

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Fix 1. Run the troubleshooter

We recommend starting with the troubleshooter:

  • Type Troubleshoot in Windows search and press Enter.
  • Select Additional troubleshooters/Other troubleshooters.
  • Find Windows Update from the list.
  • Click it and select Run the troubleshooter/Run.
  • Restart your PC when the update process finishes.

Run the the troubleshooter

Fix 2. Fix corrupted files

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  • Type cmd in Windows search
  • Right-click on Command Prompt result and select Run as administrator
  • When User Account Control shows up, click Yes
  • Paste the following command into the new window:
    sfc /scannow
  • Press Enter and wait till the scan is finished
  • Once done, run this set of commands, pressing Enter after each:
    DISM /Online /Cleanup-Image /CheckHealth
    DISM /Online /Cleanup-Image /ScanHealth
    DISM /Online /Cleanup-Image /RestoreHealth
  • Restart your system.

SFC and DISM

Fix 3. Disable third-party anti-virus

Third-party anti-virus software can sometimes interfere with the Windows Update process, leading to errors like 0x80070661. This is because the security features of the anti-virus program can conflict with the security features of Windows, causing the update process to fail.

To fix this issue, you can temporarily disable their anti-virus software to allow the Windows Update service to download and install updates. You can simply open your security app and look for an option to disable it temporarily. Once the updates have been downloaded and installed, the software can be re-enabled to ensure continued protection of the system.

Fix 4. Reset Windows Update components

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  • Open Command Prompt as administrator, as we explained before.
  • In the new window, paste in each of these commands, pressing Enter each time:
    net stop bits
    net stop wuauserv
    net stop appidsvc
    net stop cryptsvc
    Del “%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\*.*”
    rmdir %systemroot%\SoftwareDistribution /S /Q
    rmdir %systemroot%\system32\catroot2 /S /Q
    regsvr32.exe /s atl.dll
    regsvr32.exe /s urlmon.dll
    regsvr32.exe /s mshtml.dll
    netsh winsock reset
    netsh winsock reset proxy
    net start bits
    net start wuauserv
    net start appidsvc
    net start cryptsvc
  • Restart your system.

Reset Windows update components

Fix 5. Download WSL manually

  • Open your web browser and navigate to the Microsoft Update Catalog website.
  • Look for the latest version of the WSL update available on the website or download the specific version mentioned in the error message.
  • Choose the appropriate version for your system’s architecture, either ARM 64 or x64, and download the Cabinet file.
  • Extract the Cabinet file and run the installer included in the package.

Install manually

By following these steps, you should be able to update the WSL and resolve any errors related to the 0x80070661 error code on your Windows 10 or Windows 11 system.

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About the author
Jake Doe
Jake Doe - Computer technology geek

Jake Doe is the news editor at UGetFix. Since he met Ugnius Kiguolis in 2003, they both launched several projects that spread awareness about cybercrimes, malware, and other computer-related problems.

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