Put the hard drive in a plastic bag and MAKE SURE IT IS SEALED. Then, place the hard drive in the freezer, and leave it there for at least an hour, longer if you have time. Then, remove the hard drive from the freezer and put it back in the computer, try to do this as fast as you can without being clumsy. Then turn on the computer and it MIGHT work. If it does quickly back up all your important files, because the hard drive is not guaranteed to continue working, if at all.
so, umm, err yeah