KMS activators are commonly used in unofficial or unauthorized activations, and while it can offer activation without internet connectivity, it is often considered illegal and potentially harmful. Uses KMS (Key Management Service) to activate Microsoft products. Operates without internet access for activation. Activation lasts for a limited period before needing to be renewed. Risk of violating Microsoft’s terms of service with KMS activation. Long-term use may cause technical issues or security vulnerabilities. Supports activation of both Windows and Office editions.