I've had this problem for a while now, though it comes and goes. For some reason, whenever I restart my computer, it goes into a "slow-mo mode" until a seemingly random moment in time. Usually it comes out of it's stupor after a few wake ups from hibernation.
While in "slow-mo mode," all animations, actions, game-play, everything is cut in half. It's not an FPS drop, everything just plays like a video in slow motion.
I've searched and searched for someone with a similar problem, but have yet to find anything related.
Any advice to help remedy the problem would be much appreciated.