Phew...sounds complicated.

But thanks. I will look for an OS installation CD when I get home, but from I recall, I didn't get one when I bought my PC. That's why I've been digging around the Dell site (in my account) for any options to get a CD or otherwise download things, but haven't found an answer. I'll dig up any documentation I have.
When I was running ComboFix, the last thing that was working before the fatal reboot, it was asking me to install Recovery Console. Since I wasn't connected to the internet, I wasn't able to. Being at work, I was afraid to plug it into the network, fearing I could spread something. Anyway then the reboot prompt came...and you know the rest.
So I'll see what I have at home and ask around for an XP install disc if I don't have it. Thanks!