Hi, I was performing a driver update on my computer, and thought I'd let it work its magic without me doing anything to disturb it, which of course meant it went into Energy Save/Power Save mode in the middle of the driver update procedure.
This caused a temporary crash of my computer which CCleaner are currently trying to reverse.
Having a game up and running/watching videos and clips online blocks the energy save option from activating, so perhaps you should apply such a setting to this feature to avoid causing accidental computer crashes?