It's been bugging me for a while now, and I can't find a solution anywhere else. Whenever I'm playing a Valve game that uses hl2.exe, or Call of Duty 4 Multiplayer (iw3mp.exe), and I go to close the game, it goes to desktop and appears to have closed, but if I go to task manager and processes, the .exe is still there using around 200mb of RAM. If I try to close it then I just get an "Process could not be terminated.Access is denied" error. Sometimes when I'm playing Counter Strike: Source and close it, the game stops responding and just hangs at a black screen with hl2.exe still running. Anyone have any ideas?