I've been doing alot of upgrading to my computer lately and whether or not that 's the cause of my troubles, I don't know. Lately my computer gives me random BSODs and program crashes ohh...every other week or so. From googling the error messages and searching for different possible solutions I've gotten to the point where I'm pretty sure my HD is failing. (Probably bumped it hard once or twice in the upgrading processes. I've purchased a new HD intended to be a replacement...but it was an OEM from mwave.com that came with nothing but the drive itself. I've changed pretty much everything in the computer except a harddrive so I'm kind of at a loss as to the best way to go about it. Ideally, I'd like to just save some info (which I have backed up to a 1gb usb key and a couple of cds.) and just reinstall all other programs (mainly games and whatnot). Two problems with this...1. I don't have the first clue what to do...and 2. My computer is a Dell Dim. 8400, it came with XP Home and a disk for that, I have since purchased an XP Pro upgrade. Can I just use the Home disc to install Home on the new harddrive and then upgrade to Pro like I did the first time? I've heard of people not being able to do this because of Dell's discs not having the full version of XP whatever only enough info to repair or reinstall (I'm assuming on the original hd?) I guess anyone who can at least start me off with some info would be appreciated?