KMSPico is a popular tool for activating Windows without a genuine product key, but it is not a legitimate or safe method for activation. Using KMSPico can pose serious security risks, including the potential for malware, viruses, or unwanted software being installed on your system. Additionally, using such tools violates Microsoft’s terms of service, which can lead to legal consequences. It is always recommended to use genuine software and purchase a legitimate license to ensure the security and integrity of your system.