Here is a deep dive into the history of Windows XP activation, how WPA Kill functioned, and the modern state of XP "cracking." What was Windows Product Activation (WPA)?
: Written by Paul Mason of Fully Licensed GmbH, this is the definitive technical source. It explains how Windows XP generates a unique 50-digit Installation ID based on 10 specific hardware components (CPU, RAM, MAC address, etc.). Windows Xp Activation Wpa Kill Exe