Basically, my CPU was being slowed down by "_windowserver". I found the file directory by: going into Activity Monitor > selected "_windowserver" > I don't remember if I clicked Inspect or Sample. I found the file in /System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Resources/WindowServer I put it in the recycle bin, and everything froze. I restarted my computer and it's stuck at the grey screen on startup. I imagine to put the file back would be like Turn on computer Apple+S Cd ~/ .Trashes ls -a And then move file xxxxxx to directory xxxxx. Help!!!