KMS Activator is a software tool used to activate Microsoft products, including Windows and Office, by simulating a Key Management Service (KMS) server. Uses KMS (Key Management Service) to activate Microsoft products. Works offline: Can activate systems without requiring an internet connection. Temporary activation, reactivation is needed periodically. Unauthorized activation could violate software licensing laws. Not recommended for long-term or commercial use, as it may lead to software instability or security risks. Can be used on various editions of Office and Windows.