When I start up a game, there are lines running diagonally across the screen, in which you can barely see through. This goes away when I spectate, or go to the menu. I've tried re-downloading the game, but it didn't work. Any suggestions?
Make sure your drivers is fully updated. If this not help check my signature and upload your DxDiag.txt It's will be also useful if you post screenshot of how this is looks like.