This morning when I tried to start my comp it would only get to the first boot screen and freeze, so I thought my RAM(2gig's crucial, 1gig each) might be the problem, so I pulled 1 of the sticks out and after that it started, so after I got it to boot I tried another start up, and again the freeze, so I pulled the other stick and put the other one back in and it started, anyone know whats causing this?