Good plan to virus check software which comes from an unknown source.
In particular I've heard of a lot of pirated disks containing A500
bootlock virus, etc.
I know what you mean about the "computer licence" idea :-)
I used to work for a communications company who also sold cellphones,
cordless phones, faxes, etc.
We used to get so many moron customer complaints due to people not
reading instruction manuals, or who were generally just too thick to
use something. That was particularly the case with fax machines.
We thought of having an "IQ rating" on all equipment, where
a customer's IQ would have to exceed that of the equipment's rating.
Of course that would have meant we'd hardly ever sell anything....