Stop spamming, both of you. As for the protection, it is a simple GUID-based protection, each account has the hack limited to one computer, whos GUID is stored on your server. The hack checks if the GUID of the PC it is run on matches a stored GUID, then it either runs or gives an error.
Thank you!! But was is the name of the program which can read my PC Id? I need this programm, too!
There are many ways to generate a GUID, google a GUID - generating program and use it to get unique GUIDs for each PC. Also make sure that your hack or w/e you wanna protect has the same GUID gen, so it can verify if the GUID is correct.