I have a strange issue that crops up from time to time. I am running a Radeon 4890 and windows 7 ultimate 64bit.
The issue is that, at what appear to be random intervals spaced weeks apart, my screen starts to go black for about a second everytime I move, minimize, or maximize a window on my desktop. I can fix the problem with a reboot, or simply by changing my screen resolution to a lower resolution and then right back up to my normal 1920x1080. After fixing, it won't crop up for another few weeks at least.
Anyone else ever come across this type of issue?