Hello Ping Guo,
Thank you for the detailed information. The error code 0x800f0922 during installation of KB5070882 typically indicates a failure in the advanced installer phase, often caused by a corrupted scheduled task or IIS configuration issues.
Here are recommended steps to resolve the issue:
- Reset IIS configuration using
wsusutil.exe usecustomwebsite falseand verify that required IIS roles (e.g., ASP.NET, Static Content) are enabled. - Check CBS.log for entries related to
Microsoft-OneCore-SecureBootEncodeUEFI-Task, which may indicate a failed scheduled task component. - Run DISM and SFC again, ensuring the ISO used matches the exact build version (14393).
- Temporarily disable Windows Defender and retry the update, as Defender startup failure may be blocking update components.
- If the update still fails, consider installing KB5070882 via offline servicing using DISM with the .msu file.
If this resolves the issue, feel free to click “Accept Answer” so others can benefit too. Let me know if you’d like help reviewing CBS logs or preparing an offline update package.
Best regards,