I have these strange colored (mostly white but some are a darker blue) boxes that will come and go randomly. It's far worse when I first start my computer and they become more scarce as the computer warms up. Running Radeon HD6950 card that's not overclocked and just installed brand new driv ers for it (seemed to help but it didn't fix the issue). First noticed it when I installed Steam several months back and a game from steam. Appears Steam may have changed some video settings but don't remember now? Recently uninstalled steam and then redownloaded driv ers today. Note they're the most prominent in the taskbar. It does not show up in games which I run in full screen mode. It does, however, show up when I'm running a browser (like google chrome) or when I'm just on my desktop. While I'm typing this, boxes are showing up, flickering, disappearing, etc. If it runs games fine, it shouldn't be my monitor or vid card. Running Windows 7 64 bit. Screenshot attached. Help?