Microsoft allows anyone to download and install Windows for free directly from their website. An unactivated version runs safely, receives critical security updates, and only limits minor cosmetic personalization options.
If you have already used this tool, take immediate steps to clean your system: Mini Kms Activator V1.2
The key takeaway is that unofficial KMS activator shares the same fundamental security flaws: you are downloading unsigned code from untrusted sources and granting it system-level permissions. Microsoft allows anyone to download and install Windows