If this were a story of "who wins," the answer depends on your style:

KMSAuto (often called KMSAuto Net) is a portable tool, meaning you don’t necessarily have to install it.

These tools simulate a fake KMS server on your local machine. When you run them, they trick your Windows or Office into thinking it is talking to a legitimate corporate KMS server. The activation is valid for 180 days, but the tools typically install a background task to automatically re-activate your software before the period expires.

In 2023-2025, security researchers have found that over contained secondary malware—info stealers, ransomware droppers, or proxy bots.