: Official KMS activation typically lasts 180 days. Activators often install a hidden scheduled task that automatically runs every few days to "renew" the license, creating the illusion of a permanent activation.
: These tools may automatically convert "Retail" versions of software to "Volume License" versions so they can be targeted by the emulated KMS server. Significant Security & Legal Risks KMSnano Activation Guide and FAQ | PDF | Microsoft Windows KMSnano-Activator--Windows---Office--Final-2021-Download
While and similar tools (like KMSPico ) are often marketed as free ways to activate Windows and Office 2021, they are third-party "cracking" tools that bypass official Microsoft licensing. : Official KMS activation typically lasts 180 days