KMS Activator is a software tool used to activate Microsoft products, including Windows and Office, by simulating a Key Management Service (KMS) server. Emulates a KMS server to activate Windows and Office. Works offline: Can activate systems without requiring an internet connection. Temporary activation: Typically requires reactivation every 180 days. Legal risks: Unofficial use may violate Microsoft’s terms of service. Not suitable for prolonged or business-related usage. Available for use on Windows and Office products (various versions).