Unlike permanent "MAK" keys, KMS activations are valid for 180 days. Version 4.1 automates the "re-arm" process. It creates scheduled tasks that wake up every 10 days to check the license status. If the license falls below the 30-day warning threshold, the tool silently reactivates the product without user intervention.
While the technology of KMSpico is fascinating from a reverse-engineering perspective, the distribution of version 4.1 is a minefield. The original developer (known as "Hazar" or "heldigard") stopped updating the tool years ago. Consequently, any link on a torrent site or random download blog claiming to offer "KMSpico v4.1 Offline" is almost certainly a repack. -KMSpico v4.1 Offline Office and Windows Activator-