i put linux on my old computer and everything was going dandy, i was going to make it a folding machine. so it has been running about a week fine, so i get on it, listen to some music and browse the internet, and i accidentally close the terminal that the folding was going on in, so i go to the menu and click terminal to restart it, my computer then just lags out, after 5min i still cant do anything so i unplug the computer, plug it back in and restart it, now i get the info hard drive 0, and hard drive 1 cannot be found, so i restart the computer i get same message, so i unplug it and leave it be for a while and still same thing when i try and restart it same thing. any ideas?