Ellenpoly -

Since you implied that you didn't have an AntiVirus program prior to the recent download, it's almost a certainty that you have had some malware on the machine. If necessary files are corrupted, possibly when the AV "cleaned" them, you'll need to look for "How to extract individual files from CAB libraries." The method varies slightly from one Win version to another. You may need to extract a couple of files and copy them to the right place on the machine.

If the files that the machine is looking for were "bad stuff," the fact that you DO get an error message should give some reassurance that the "bad parts" have been removed or disabled. What's left is (maybe) just nuisance stuff. While there's nothing incredibly difficult about editing the Registry, you may want to look for someone with some experience to do some hand holding if regedit is needed to get ride of extraneous file calls.

John