Okay. I'll wait to do anything else until the rootkit is gone, then. I already got rid of Norton though. Glad to have that done. Thanks so much for the help with that! I originally wanted to wait until after the rootkit thing was taken care of before I got rid of Norton, but aside from making Avast tell me that its there, the problem file does not seem to be having any effect on the computer. So I figured it would be okay to try to get rid of Norton. It worked, but I'll quit messing with things for now until the rootkit issue is solved.
And as far as the rootkit goes, I think I'll wait for a reply from micky77 about the RootRepeal report, then I'll do the things you wanted me to do with HjT (unless I should do that first?), and then I'll try one of those Rescue CDs.
But for now, I think I'll go to bed and get back to all of this tomorrow.
Thanks again to you and to everyone who has helped me so far. All of your ongoing help is greatly appreciated!