KMS Activator is a software tool used to activate Microsoft products, including Windows and Office, by simulating a Key Management Service (KMS) server. Facilitates activation of Windows and Office by mimicking KMS servers. Operates without internet access for activation. Requires periodic reactivation every six months. Risk of violating Microsoft’s terms of service with KMS activation. Not recommended for long-term or commercial use, as it may lead to software instability or security risks. Compatible with a wide range of Windows and Office versions.