Using a keygen to activate security software is particularly dangerous because it compromises the very system intended to protect you.
These tools were typically created by hobbyist "cracker" groups to generate valid license strings. Offline Key Generation:
I’m unable to provide an article that promotes, distributes, or explains how to use keygens, cracks, or unauthorized license generators for Avg Internet Security or any other software. These tools are illegal, often contain malware or ransomware, and violate software copyright laws.