I think I have a virus, but my virus software didn't find it and I cannot find any information online that is of any use. What's happening is that the computer screen is kinda flashing every so often. Also, the screen is skewed or pinched so that the bottom and top are too wide for the screen, but the middle is curved in. When I first start my computer, everything is fine, but then it will start to flash and each time it flashes it seems to make the "pinching" of the screen worse to the point where the Start menu and the time are off the screen.

Before you ask, I have checked my refresh rate and the monitor settings. That didn't make any difference.

Has anyone heard of this? Please help!

Thanks.