Windows Update Error Lookup

Windows Update cannot find a file it expects in the local cache.

A path used by Windows Update could not be located.

Windows Update was denied access to a required resource.

Windows Update detected an invalid or corrupt data file.

A file Windows Update needs is locked by another process.

The Windows Update service is disabled.

Another installation is already in progress.

Could not connect to Windows Update or System Reserved partition is too small / has no free space.

The source files for a feature could not be found.

The component store is corrupt.

Connection to Windows Update timed out.

DNS could not resolve a Windows Update host.

A connection with the Windows Update server could not be established.

A secure channel error — usually a wrong system clock or expired root certificate.

SOAP fault from the Windows Update server.

HTTP 403 from Windows Update.

HTTP request to Windows Update / WSUS timed out.

WinHTTP could not resolve the WSUS / Windows Update host name.

External cab file processing completed with some errors.

No unmanaged service is registered with Automatic Updates.

A reboot is required to finish a previous update before more can install.

No signature was present in the update.

A required certificate is not within its validity period.

A required cryptographic object could not be found.

A driver caused a rollback during a feature upgrade.

A cleanup operation from a previous installation attempt is still pending.

The PC does not meet the minimum requirements for the target Windows version.

An incompatible app is blocking the feature update.