Recently, I got a Toshiba Portege R600-S4201 laptop and have Windows 7 OS. It was working perfectly well for first few weeks. But suddenly it started showing up with this particular problem. The Screen started showing distorted videos, which is very annoying at times. The distortion is not always, but occurs sometimes. Does anyone have any idea related to this issue? What must be causing this to happen? How can I get my problem solved as quickly as possible? Please help me by giving me your suggestions.