DISM – Check Image Health in Windows PE

The Scenario

My Windows 8.1 client has been corrupted by a recent update and it is failing to boot. The auto-repair functions are unable to resolve the issue so I’m stuck in a reboot loop.

The Problem

I’ve launched the recovery command prompt console (check the blog post to see how) but the usual commands I’d use to check the status and then repair a corrupt OS do not work in in the Windows PE environment:

Dism /Online /Cleanup-Image /ScanHealth
Dism /Online /Cleanup-Image /CheckHealth
Dism /Online /Cleanup-Image /RestoreHealth /Source:\\network_share\sxs /LimitAccess

This is the result of Windows PE profiling being removed in 8.1 resulting in some options having been removed. See TechNet for more details.

The Solution

Run the following commands instead:

DISM /Image:D:\ /Cleanup-Image /ScanHealth
DISM /Image:D:\ /Cleanup-Image /CheckHealth
DISM /Image:D:\ /Cleanup-Image /RestoreHealth

NB In my example windows PE had mounted the system drive to the D drive. Use wmic logicaldisk get name to determine the drive mapping to your system drive and replace the “Image:D” to match that drive mapping.

 

Disclaimer: provided “AS IS” with no warranties and confer no rights

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