Some variants turn your activated PC into a zombie in a botnet, using your internet connection to launch DDoS attacks on websites or distribute spam.
Security risks
You do not need a risky KJ Activator. Here are legitimate ways to permanently activate Windows and Office. kj activator windows 8 7 xp vista office permanent
What it claims to do
Supports a wide range of Microsoft products, including Windows XP, Vista, 7, 8, 8.1, 10, and Server editions (2003–2019). Office Activation: Some variants turn your activated PC into a
Legal Implications of Using Activator Tools for Windows - YTU including Windows XP