Right, I am running windows Vista, and have not had any problems with it at all, I upgraded my current machine from XP. My graphics card is an ATI Radion 9600

I am sure this is not a vista problem, but thought I would let you know what I am running in case it would help.

I recently plugged my LCD TV into my PC so I could watch Heroes on the big screen, and messed about with the settings to make it work, but when I plugged my monitor back in, I get this funny almost static across some of the images and colours.

Does anyone know what this could be?