|Download MalwareBytes on your own machine and put the download on a Flash Drive or CD. You can then take it and install it on their machine.|
Sometimes these viruses such as "Antivirus 2010" stop exe files from running. If this happens change the MalwareBytes download file extension from exe to bat and it should install. If for the same reason MalwareBytes itself then refuses to run, go to it's own exe file and rename that ones extension to bat too.
How to know you are getting old 5:
A lamp post backs into you