It sounds like similar problems people have been having with some of the new ATI graphics cards; have you tried contacting the manufacturer about this problem, or searching their forums for similar situations/ solutions?
Have you been regularly installing driver updates from HP?
I have recently started having a problem with my computer in which the screen gets static (the best description I can think of) across it. It is in stripes/rectangles for the most part. When I scroll on a window or type, the static in that location temporarily goes away, but then comes back. It comes quickly but gradually. I have only noticed it when I have gotten on the computer after having it on hibernate or sleep. Closing the lid and reopening it does not fix it. Restarting it completely does fix it; however, I would like to be able to use hibernate and sleep without restarting the computer (which kind of defeats the point of those functions).
I have an HP notebook that is about 5 months old. It uses Windows 7, and I regularly run full Norton scans on it.
Any suggestions on how to fix this would be appreciated!