Cracking Windows XP Activation Algorithm for Offline Activation.
Originally Published 2 years ago — by PCMag

The Windows XP activation algorithm has been cracked offline using Linux, allowing people to activate new Windows XP installations safely and securely offline without altering the OS. The crack has been made possible by a software that has been on the internet for months, and it’s not known who made and shared it. Despite being over 21 years old, Windows XP is still popular in some corners of the world, and a 2019 study found that one in three US businesses still had at least one XP machine on their networks.