Well hahas, I never heard of a malware problem doing that... but it is most likely to be a screen problem. Not a graphic card problem. I've seen LCD monitors (HDTV for example), being knocked down or "injured" so in result comes a huge ugly rainbow splat on the screen. Which was un-reverse -able. lols. However, I have heard about a problem where if a malware infected computer was infected, and the user attempted to install a Graphics Card update, the screen will be all... well I will say it like when a Television has NO SIGNAL that kind of screen. Not quite but similar. It was like running on a 8-color resolution.
But, maltd, do not worry it's not a malware problem. No need to be concerned. :cowboy: