Alternatively you can use CPU ID. Hard Disk Number Volume Serial Number is also an other option, but the Volume serial Number Changes when you format your Hard Disk.

So the best way is to use combination of CPU ID And MAC No. In absence of MAC no you can proceed with CPU ID.



We are using the mac address to identify the client machines on a network.
>However now that they are using some Windows 7 terminals, and they are using some wireless device, it seems that those machines do not get a mac address. At least our code does not return any value.
>What is the second best way to identify a computer, the only important thing is that this computer must generate the same key each time and it must be unique.