>>>Sometimes getdiskserial fails. It means that returns empty string. It depends on the user. But with the same user (poweruser), in different computer (in the same network) does the job. I can have the correct string, changing the user (as administrator works), but the poweruser has ( or so it seems) the complete control. I do not understand this behavior.
>>>Sombody can help me to solve this problem?
>>>Thnx in advance
>>
>>Don't use diskserial for copy protect. Use ethernet ID for that. That's a more reliable way.
>You mean the MAC address, I suppose.
>
>Peter

Yes... Cetin said that "MAC address can be changed, too", but it's hard to do for an average user.