My wife spilled some tea on my laptop and now it says that there is no operating system. My guess is that the hard drive is now no longer good. I can't even restore with the restore disk. I have a Gateway laptop the 600 series. Is all I have to do is get a new hard drive or might there be other problems? If I need to get a new hard drive, how would I go about figuring out which one, etc. Thank you in advance for your help.