Copyright protection

Hi guys,

I have an Access database that I am running and I want to prevent people
from using the database without my permission. How could I protect it?

My one thought is to uniquely identify the machine that it is running on and
then use that identifier in conjuntion with the date/time to produce a key
that I will issue to the user. In order to do this I need my code to lookup
or identify some unique number on the computer.....I dunno.......maybe the
CPU production serial number(if there is such a thing) or somethng similar.

Any ideas?

Thanks

Kenny