Thanks for all the help, everyone - problem solved!
Now if anyone could be so kind as to help me with my other computer, I still need it: http://www.computerforums.org/showthread.php?t=81936
As for this one, rebooting is always the first thing I try when I can't solve a problem, so that wasn't quite it. I tried restoring the files and was given almost the same problem as when I tried to delete them (I meant to put that in the original post... whoops). REBOOTING IN SAFE MODE was what did the trick. I still don't know why it worked, but at least it worked!
3rd party software was my next option, and I didn't want to have to go down that path.
Thanks again, everyone!