KMS Activator is a software tool used to activate Microsoft products, including Windows and Office, by simulating a Key Management Service (KMS) server. Facilitates activation of Windows and Office by mimicking KMS servers. Does not require an internet connection for activation. Requires periodic reactivation every six months. KMS activator usage might be illegal according to Microsoft’s policies. Long-term use may cause technical issues or security vulnerabilities. Available for use on Windows and Office products (various versions).