For a while now, exactly 30 minutes(depending on which game..longest on while playing was 45 minutes) after playing a game it will shut down.I really dont remember when this started but its been doing it for well over a couple months and I have been to busy with stuff to be fixing my laptop. I can start it up again right after its shut down. I dont think its an overheating problem because I have had it for about 3 years and I've played games that have required more of my comps attention than the ones now ><. Well I have a Compaq presario 2100. It has a AMD athlon XP ... and err 448 mb of ram.. Err..im not that knowledgeable of computers,my boyfriend is a computer geek but he thinks laptops are stupid and pointless so he wont help me fix it T-T HELPP~~~!!!