2026-02 .NET 8.0.24 Security Update for x64 Client (KB5077863) problem updating.

Question

my Windows update of "2026-02 .NET 8.0.24 Security Update for x64 Client (KB5077863)" will not update and it is taking forever to update (more than 12 hours). Initially it kept failing, but after stopping the wauserv process and restarting it the update started and ran for more than 12 hours I watched it download and then execute. The next day the System Windows Update started installing it again. It has now been running for a few hours and is still in the "download" phase. I do not see any files in the downloads folder. What is wrong?

Answer 1

It sounds like you're experiencing a frustrating issue with the Windows Update process for the .NET 8.0.24 Security Update. Here are a few steps you can take to troubleshoot the problem:

1. Check for Errors: Look for any error messages in the Windows Update log files. You can find these logs in the CBS.log file, which may provide insight into what is causing the update to hang or fail.
2. Restart Windows Update Services: Since you mentioned stopping the wauserv process, ensure that you restart all related services. You can do this by running the following commands in an elevated Command Prompt:
   • net stop wuauserv
   • net stop cryptSvc
   • net stop bits
   • net stop msiserver
   • net start msiserver
   • net start bits
   • net start cryptSvc
   • net start wuauserv
3. Run Windows Update Troubleshooter: Use the built-in Windows Update Troubleshooter to automatically detect and fix issues with Windows Update.
4. Check Disk Space: Ensure that you have enough disk space available on your system drive, as insufficient space can cause updates to fail.
5. Manual Installation: If the update continues to fail, consider downloading the update manually from the Microsoft Update Catalog and installing it directly.
6. Monitor Network Connection: Ensure that your internet connection is stable, as interruptions can affect the download and installation process.

If none of these steps resolve the issue, you may want to consider contacting Microsoft Support for further assistance.

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References:

• Windows Update hangs and new updates are uninstalled after a restart
• Troubleshoot Windows Update error code 0x800f0823