I have had this issue with two computer in the past. I had an HP Pavilion TX1000 for a while and had the issue on the Vista OS. Now I have an IBM Thinkpad T43 with Windows 7 32-bit installed and it has been fantastic up until just today. I've looked through a lot of documentation on this issue and nothing seems to precisely match what is happening: Sometimes when I open up a window (could be an internet browser, my email or even windows explorer) the top area and the outer edges of that specific window will flicker at a rate like a heartbeat. The screen itself is fine. Also when I try to right click on programs in my taskbar it will pop up and before I have time to click on a button it will disappear again. It's very annoying when trying to use these functions because I cannot access them. I've already tried uninstalling my ATI Mobility Radeon X300 graphics driver software and windows automatically re-installs it upon restart. Then I restart again when prompted to and I still have the problem. The odd thing is the flicker has not been hapenning constantly today. It seems like when I start typing in the window (as I'm doing now) the flicker stops. When I minimize the window and bring it back it starts back up again. I honestly CANNOT figure this out and it is getting to be a big issue as I've had it on two seperate computers and two seperate operating systems! Please let me know if you have anything that can help. Thanks.