i just had a power surge at my home and once it came back on i booted my pc and now its making a humming noise.... what should i do and how alarmed should i be because im freaking out right now, i opend the case and i think its cumming from my hard drive..............and its stopped i think..... i cant lose my pc not now, i cant afford to replace the whole thing. its just sitting at like 0-4% usage on task manager.http://i1377.photobucket.com/albums/ah51/Joseph_Downing/nothing_zpsgujpnmvz.png~original