About 2 months ago I had this prolem...and well I think its back, it all starts with a random restart and then I get a screen that says my hard drive has been changed, I then hit F1 to continue and my startup goes to a black screen that says my startup is corrupt and I need a startup disk, then I restart it all again and nothing happens, my computer starts with no problem, but it progresses to the point that I can no longer start up my computer any more, today it just started to do the hard drive has been changed stuff, what is going on? plz help!!!!