Okay have this Compaq Presario 2100, and the original harddrive was having disk read errors, so i got a new seagate harddrive, popped it in, and tried to start a CD recovery, after a few minutes it has a problem extracting a file. So i tried again, but this time it would not boot from the CD, i checked the BIOS and the CD-ROM had the first boot priority, so i got an external CD-ROM thinkin maybe the CD-ROM was faulty, hooked it up via USB, no good, wouldnt go past the COMPAQ screen, so i installed Windows via another Laptop on the Seagate HD, and then tried to put in the Compaq, and all i would get is the Windows Could Start Due To A Hardware Change, so i select start Windows Normally, the little bar starts to fill, but once it gets to the end, nothing happens and then a little while after, the computer turns off...any suggestions...or is this computer a dud ?