You can use my DriveInformation Class (you can download it from the file section, here on UT) to take the HDD serial number for the same purpose.

As Tom said, you must think that the user has the right to change any harware part on its computers and in this case you'll have to reinstall the software.

Vlad

>Hi Everyone, Is anyone know or has a program that can an ID from network card? so I can protect my program so It can't use in another computer that has diferent network card.
>
>
>Thank's
>Andri Thaslim
>andri_thaslim@geocities.com