Sometimes when I restart my computer, all animations will run in slow motion. When I log in, the fade out from the Windows logo to the desktop will run very slow. Minimizing and maximizing windows will slowly fade in and out. Playing AVI files with VLC will stutter. Running a game will make all graphics and animations again, run in slow motion.
Uninstalling and "cleaning" my graphics card drivers, and then reinstalling.
Looking in my events log for any strange problems
Several sweeps for malware and viruses
Looking at problem devices in device manager
I just do not know what to try next. Typically after I reboot my computer enough times, the problem will correct itself and it wont happen again until I restart.