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. Works offline: Can activate systems without requiring an internet connection. Activation lasts for a limited period before needing to be renewed. Using KMS activator may breach Microsoft’s license agreements. 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.