Sysprep – A fatal error occurred while trying to sysprep the machine

2 Feb

While sysprepping my golden image for my VDI collection I got this error:

syspreperror1Most people who got this was because the rearm count had been reached, but that was not the case for me.

Use this command to check: slmgr /dlv

Once I checked the log (C:\Windows\System32\sysprep\Panther\seterr.log) it mentioned Microsoft Security Essentials, which I had removed from the image since the last sysprep.

Thanks to this blog, it turns out that there was some old MSSE information left in the registry



This needed to be deleted (although the permissions at the level has to fist be changed to allow me to delete the key)

Once done the sysprep ran fine.