Every time i quit to windows from half life 2 it freezes and i hear an error message sound and have to restart windows. i've tried reinstalling and still dont work. its not my computer my computer runs it fine. and i've beaten it like 4 times and decided to download it again. so i dont wanna see replys about what computer i have it might be messin up its not. i have lastest drivers installed and everything. never done this to me before.