All of a sudden my display shows these horizontal lines whenever a window is open and the text is hard to look at. There are no horizontal lines when a screensaver is on, or when a game is on (ie starcraft), even when it's booting the display looks fine. It's when windows actually starts (when the cursor is available to move) that the horizontal lines appear. Please help me fix this problem. I think a reinstall of windows will solve this but I really don't want to backup everything again. Thanks in advance.