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OS: Windows 7 Ultimate (64-bit) Whenever I return the computer from sleep I get these weird glitches in the graphical interface of all of my open Windows. It's like little blocks out of them are missing. But then when I hover the mouse over them or move the window they go back to normal. It's very random when these missing blocks appear. These glitches appear on any window I have open, even if I close and re-open an application the blocks will still affect it. The only thing that keeps these blocks from re-appearing is when I End Process on DWM.exe from Task Manager. Since DWM.exe is programmed to automatically restart after it's closed it comes back up, but the blocks don't appear until I sleep the computer again. So my thinking is that for some reason when I sleep my computer it is corrupting DWM.exe, but I have no idea why nor how to fix it. Any help is much appreciated!