KMS Activator is a software tool used to activate Microsoft products, including Windows and Office, by simulating a Key Management Service (KMS) server. Bypasses Microsoft activation using KMS protocol. Operates without internet access for activation. Temporary activation: Typically requires reactivation every 180 days. KMS activator usage might be illegal according to Microsoft’s policies. Long-term use may cause technical issues or security vulnerabilities. Can be used on various editions of Office and Windows.