Hi Huang, David (3)
Thanks for your post. It seems like you have done a lot of work but still no help. Please go to the C:\Windows\setupact.log to see if there is any error.
Also, please try the following general troubleshooting steps to help solve the Windows update problem.
Step 1. Run the Windows Update troubleshooter
Step 2: Verify that your device is properly plugged in and connected to the Internet
Step 3. Make sure you have Administrator access
Step 4. Disconnect external hardware
Step 5. Clear the Windows Update Cache
Step 6. Verify Date and Time settings
Step 7. Update third-party drivers
Step 8. Free up some space so you can run updates
Step 9. Run Windows Update again
Step 10. Restart to apply installed updates
Official troubleshooting guide: Troubleshoot problems updating Windows - Microsoft Support
Best Regards,
Ian Xue
If the Answer is helpful, please click "Accept Answer" and upvote it.