The original drive is no longer stock, and I don't have a backup of the C drive (which as it turns out was a dumb thing to forget). I did download a package that had supposedly good C and E drives, and put the C drive on the hard drive (including the fonts folder). I also tried the C drive from a softmodded box I have. Neither fixed the problem. I'd try other fonts folders if I could find any, but I just found the one.