ren C:\Windows\SoftwareDistribution SoftwareDistribution.old ren C:\Windows\System32\catroot2 Catroot2.old Restart services:
Get-WindowsPackage -Online | Where-Object $_.ReleaseType -eq "Security Update" | Remove-WindowsPackage -Online -NoRestart Then reinstall the latest cumulative update manually from Microsoft Update Catalog. Download the same KB update that initially failed. Extract its .cab file and manually replace missing manifests: 0xc86044d2 full
Logs showed that a corrupted update.mum manifest file was synced from Microsoft’s CDN. The CBS stack rejected the entire update. ren C:\Windows\SoftwareDistribution SoftwareDistribution