superbb wrote:Is there a way to get back on that computer? Or is it officially dead?
First the computer is far from dead. Installing a new hard drive should get it going again, of course the M$ software lock in may be harder to get around without installation media. Still it would make quite a good linux machine, especially as linux tends to run leaner and faster on old hardware.
Secondly don't despair on your data just yet. Check the internal cabling to the drive. Carefully unplug and replug each connector, one at a time so you don't get confused as to what goes where. Sometime this will clear built up dust or corrosion and allow a drive to "spring back to life".
If this does work, then now is a very good time to backup all the data on the drive because it may not work for long.
Alternatively if this doesn't work find someone who knows what they are doing and try mounting the drive as a read only secondary on another working computer. Possibly use a USB drive caddy to provide a safety barrier between the old drive and the working computer. Often a drive that can't be booted can be viewed this way and you'll be able to copy files off. I've done this a couple of times for friends.
Good luck.
Learn from the mistake, in the future backup your files, or at least get some SMART monitoring tools to give you a possible early warning of failure. On linux the packages are ide-smart or smartmontools, I've no idea on Windows but they must have an equivalent.