>The following works if a computer has a network card from which you can read the SN. The easiest way I know is to generate a new GUID and take from it the network card SN.
>
>Of course, this number is specific to the network card, so, if the user changes the network card, your software will not work anymore. But this problem doesn't have a solution. Whatever ID you would use, the user can always change that part (or even the whole computer), so, you have to deal with this situation anyway.
>
>Vlad

Hello Vlad

Yes, i want to get any hardware SN or ID, for my software to be activated with a different key on each computer.
I know this is a problem, but this a way to avoid local piracy.

Not all computers have a network card because my clients will be 1-user systems.

Juan C.