Sadly, when I went from Snow L. to ML, it appears to have fried the Hard Drive, and I need to go buy a new one (cheaper than new laptop, and cheaper than $755 flat rate Apple charges to 'fix' what they can't even diagnose yet). I don't know where to look for Hard Drives, or which I need. The Mac is from 07 or 08 (not exactly sure) and it's 17" 2.4 GHz. Not sure what the MBP can handle, or where to buy. Suggestions on where to determine this? Thanks in advance!