Okay, though I am fairly technologically iliterate, I was able to retrieve my documents from my computer, meaning I've still got the first draft of Psi-Watch, the completed Guide to the Known Galaxy and the current draft of Otherverse America. Thankfully, nothing was lost.
As far as I can tell, my Wacom graphics tablet's drivers crashed which was slowing my computer to a crawl (IE: taking over 2 hours to complete frickin' startup!). I deleted it, and will try reinstalling my tablet later. Hopefully, I don't be left with a $400 Wacom paperweight after all this is done.
At this point, the computer is running again, and I can write on it (though I'll definately be backing stuff up to my flash on a much more regular basis), though I may have to start looking into buying a new desktop pretty soon. Fortunately, WalMart and BestBuy are selling their PCs pretty cheap these days, and it's been time to upgrade for a couple of years now.