Solution Steps

1. Run Windows Update Troubleshooter: Settings → Update & Security → Troubleshoot.
2. Restart Windows Update service: Services → Windows Update → Restart.
3. Clear update cache: Stop Windows Update service → Delete C:\Windows\SoftwareDistribution → Restart service.
4. Run DISM and SFC: Command Prompt (Admin) → "dism /online /cleanup-image /restorehealth" → "sfc /scannow".
5. Check disk space: Ensure at least 20GB free for updates.
6. Disable antivirus temporarily.
7. Manually download and install updates from Microsoft Update Catalog.