When I try to view a u-tube video in my browser by pushing the play arrow in either Chrome or Firefox, suddenly my screen looks like it is displaying a wrapping paper design. Vertical stripes of different colors fill the screen. The only way that I can get rid of this is by rebooting my computer. I have an old Dell desktop computer (8 years) and I am running windows XP with 1 gig Ram. I really hope someone can help me with a solution.