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WU_E_UH_INSTALLERHUNG
WU_E_UH_INSTALLERHUNG means the update installer did not finish within the time expected by Windows Update. The package may be waiting on CBS, MSI, user input, a locked resource, or a reboot-dependent state transition.
What to check
- Examine
WindowsUpdate.logandCBS.logaround the stall to see which package or sub-installer stopped making progress. - Check for pending reboot state, servicing operations already in progress, and low free space on the system drive.
- If the update uses an external installer, verify that it is not waiting silently for interaction or blocked by another installer instance.
Microsoft: Fix Windows Update corruptions and installation failures
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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