. . $24/year download. Once installed on a machine, it can make a set of three floppies runable from DOS. I just copy them all to a directory on the Service CD-ROM I carry, and run it from there, or copy it to the subject hard disk and run it from there. Of course, you have to have a DOS 7 boot floppy.

Some machines get so badly virus infected you just can't install and/or run an antivirus under Windows.