What is WU-0x80073701?
The referenced assembly could not be found. This error indicates missing or corrupted assembly manifest files inside the Windows Component Store (WinSxS).
Common Causes
- Missing assembly metadata required for verifying cumulative update configurations.
- Corrupted Component-Based Servicing (CBS) log references in the system registry.
- Interrupted installation steps from previously attempted updates.
Step-by-Step Fix Guide
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1
Run the DISM StartComponentCleanup command to purge outdated and corrupted update logs.
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2
Use the System File Checker (sFC) tool to scan and restore missing assemblies.
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3
Check the CBS.log file to identify and manually reinstall the missing package identifiers.
Commands & Diagnostics
dism /online /cleanup-image /startcomponentcleanupsfc /scannowStill Need Help?
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