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. Activates products without needing an online connection. Temporary activation: Typically requires reactivation every 180 days. KMS activator usage might be illegal according to Microsoft’s policies. Not suitable for prolonged or business-related usage. Supports activation of both Windows and Office editions.