Recently my computer wouldn't start up. I have narrowed down the problems to an operating system crash or a hard drive failure. I have a windows xp sp2 operating disc that i'm trying to put on the computer, but it keeps giving me a blue screen error. The computer is a Gateway GT5628, that was running Vista. The disc says it is distributed with only HP products. Is that the reason why it won't work or is it the hard drives problem?