Im working on a friends desktop (Acer M1100, Vista home pre.) that the original 250gb SATA HD crashed. So I installed a new 750gb SATA drive, reloaded windows, then hooked up the 250gb HD to see if it really is dead. Well after tinkering with it and getting windows to see it (although not with a drive letter so it could be viewed in explorer), I ran killdisk to completely wipe the drive clean. Well at 99% it crashed, some sort of error that I don't remember now and now device manager doesnt see the drive (but I havent rebooted yet either). Is there any free programs that I can use to truely see if this HD is toast?