KJ Activator is a "KMS" (Key Management Service) style tool. Originally, KMS is a legitimate technology used by large companies to activate many computers at once via a central server. Hackers created "activators" to mimic these servers, tricking your computer into thinking it has been verified by an official source.
: Most "KJ Activator" download links found on third-party sites are bundled with Trojans, ransomware, or keyloggers download kj activator link
Here is a detailed review explaining why you should avoid this tool and the risks involved. KJ Activator is a "KMS" (Key Management Service) style tool