I'm using Windows Vista (Home Premium), 64-bit. This morning I was reading a word document when this happened: (notice the pattern)
I'm not sure what is causing this, but the problem re-occurs roughly every half hour, especially I'm running multiple programs. Sometimes, the screen is completely covered with this pattern.
Is this something wrong with windows or is a hardware problem?
Thanks for your help!

I'm not sure what is causing this, but the problem re-occurs roughly every half hour, especially I'm running multiple programs. Sometimes, the screen is completely covered with this pattern.
Is this something wrong with windows or is a hardware problem?
Thanks for your help!