You mentioned that you installed the "Drivers" but did you install the most RECENT drivers? If not, give that a try.
Recognize that video cards can die and so can the display screens. How old are each and might it be time to buy a new machine..
Have you checked for spyware with the tools from the following websites? Download, install, update, then run the free tools below:
A while back, my laptop (it's an HP, not sure if that makes a difference) would occasionally go wierd on me. Everything that was white would go sort of blueishgreenish. It didn't happen all the time and sometimes it popped up and went away. It's not affected by any website or program that I can tell, it would do it anytime. I re-installed the video drive and it went away for a few weeks but just today I saw a flicker again. Anyone know what this is or how it can be fixed? Everything functions fine, it's just the color that's messed up sometimes. Has my computer been overworked?