Way To Restore System Configuration After Repair?

Spybot Search and Destroy had finished scanning my computer (Dell Dimension e520 running Windows XP service pack 2). I then clicked on it to fix the problems it found, and started doing something else on Tradestation. A short time later, a message popped up on my screen that I had never seen before. It basically said there was a system fault, that my computer was going to reboot in 60 seconds, and that I should save all my work. The only thing I remember about the message was that it said something about "NT" system fault or error fault or something like that and a timer counted down from 60 seconds. There was no way for me to cancel it. A separate message from Spybot also popped up. I don't recall what it said other than it asking me if I wanted it to start automatically before everything loaded up the next time I started my computer because of something it had found or that had occurred. But I wasn't able to click OK before the time ran out because I was too busy trying to figure out why I was getting these messages and save my work at the same time.

My computer then rebooted. However, while Windows was loading, it stopped and gave an error message stating that a particular file (hal.dll) was missing or corrupt. On my computer I have the hard drive partitioned into two drives, C: and E:. Both have Windows on them, but the E: drive is the main drive. When I reboot my computer, it asks me from which drive I want to start Windows. If I don't choose one, it automatically selects the C: drive, which is the one I always choose anyway. When I got the error message above, I inserted my XP CD, rebooted the computer, and booted Windows from the CD so I could try to repair it. I chose the repair option instead of the clean install option because I wanted to replace what I thought was just one missing or corrupt file. The software went through the process of what looked like a clean install, but I didn't think anything of it because I've used the repair option before and I seemed to recall this being the case and everything working out okay after it was done.

However, when my system rebooted automatically after the "repair" was done, and I chose to boot Windows from the C: drive, Windows loaded up as if it was a brand new install. Everything from my normal start up configuration was gone: all of my icons were gone, none of the programs that normally run on start up were executed, only one monitor of my multimonitor set up my four monitor setup was being displayed, etc. In addition, almost all of my devices were labeled as unknown devices in Device Manager. My cable modem wasn't recognized so I had no Internet connection (I'm writing this from my laptop, which has a wireless connection to the modem). When I looked at my directories, they all appeared to be intact along with the files they contained, except all of the files in the My Documents and My Pictures directories were gone. I suspect all of the files in other directories that are created when Windows is installed are probably gone as well. When I compared the Windows directories of the C: drive where the "repaired" install occurred and the E: drive, with which I had done nothing, I realized that I wasn't missing just one file, but several hundred files across multiple directories in the Windows directory on the E: drive. When I rebooted again and tried to start Windows from the E: drive, I got the same error message while Windows was loading that I got before I "repaired" Windows on the C: drive.

I called Dell tech support, but the person I got said he couldn't help me because Windows XP wasn't installed on the computer when I bought it. He seemed to imply that he knew the solution to my problem, but wasn't willing to help me at all because it was coporate policy, even after I pleaded with him that I was desperate. Oh, he was more than willing to help me if I had a problem with DOS, since that's the OS that came with the computer. After I begged him to help me, he actually had the nerve to snicker while he repeated like a corporate bot that he was very willing to help me with any DOS problems, as if this was a laughing matter. After that, I tried calling Microsoft, but they were closed. Is there any way I can restore my system to the way it was before all this happened? It will take me forever to figure out how to reestablish my Internet connection, reinstall all of my hardware (I didn't even get any "found new hardware" messages when Windows booted after my "repair") and software and then reinstall any upgrades to those. I am in dire straits here.