help with dell xps, blinking different colors

I have a Dell XPS M1730 with Intel Centrino and Vista that suddenly started blinking solid colors, I thinkred reen blue. Soon before this happen I was having issues when using a video player, Z Video. I just put the glitches off to having Vista. I also downloaded a font from an unreliable source, yes I know, and then Avast said it detected a virus and moved it to the vault then Avast said I was all good. Well a little with later it just started blinking red...green..blue...red...green... I could be off on the order. I pressed Escape and it stopped. Then a few minutes later it happened again and Escape did not stop it. Ctrl-alt-Escape did nothing. I hit the power button and after a few seconds it the blinking stopped and the regular shutdown process began , I saved my work allowed the programs to close and it shut down. I think I should try and restart in safe mode but I am afraid of a virus doing more damage though I suspect (hope) its just a driver issue. I am not under warranty and really need this computer to work so any help fixing this problem will be amensly appreciated. .

 

Where exactly is it flashing these colors? Is it from some indicator light or the screen? Can you take a video?

 

Thank you for repling Wolf I was starting to think know one ever would. Sorry i was not clear on that, the whole screen started blinking thease colors while what i was doing just kept running behind the blinking colors. I could take a video but honestly I have been afraid to even turn it back on the whole screen just starting to blink colors like that is something I have never seen any computer do before.