Been having a problem with my computer crashing. Randomly the screen will go dead and computer will shut down. Sometimes it will lock up first before the computer shuts down. When I reboot the date and time will be 11:02 am Tuesday, Jan 01, 2008. That date could be when it was made. I bought the computer in June 2008. Can anyone give me a clue what could be wrong? I know that's not much info. 800 meg hard drive is about full.