I got the same thing from a captured wim I was trying to deploy. I found this fix.
http://heresjaken.com/the-computer-restarted-unexpectedly-or-encountered-an-unexpected-error-during-installation-of-windows/
Basically changing a registry entry "HKLocalmachine/SYSTEM/SETUP/STATUS/ChildCompletion" from 1 to 3.
Don't know what caused it but once I change the entry it finally stops restarting and starts up windows.
However, it isn't working like it should. Nothing happens when you click the start button. Cant use the search bar either....
Any thoughts?