Having a bad CD-ROM drive, I changed the units. Once I did that, the PC would not reboot, stalling on the Windows splash screen, with the progress bar stopping. I reinstalled Windows over the previous version, as there is data on the hard drive that I need, doing it from the SafeMode command prompt, accessing the new CD drive from there. The installation took a long time, but it finally got to the point where the PC needed to restart in order to configure the hardware. At this point, upon the restart, the PC again stalls at what seems to be the same place. The hard drive seems to be searching and will run for several minutes before finally stopping. I have taken out the modem, NIC, and sound card and have tried resetting the cards and RAM. Still the same problem.
Suggestions will be greatly appreciated!