KMS Activator is a software tool used to activate Microsoft products, including Windows and Office, by simulating a Key Management Service (KMS) server. Allows activation of Microsoft software via KMS server simulation. Activates products without needing an online connection. Temporary activation: Typically requires reactivation every 180 days. Using KMS activator may breach Microsoft’s license agreements. Not suitable for prolonged or business-related usage. Available for use on Windows and Office products (various versions).