Some of the Windows 10 upgrades were unlicensed and not activated, too. They worked for 30 days or so, then asked for activation and a serial key. Some worked l

Some of the Windows 10 upgrades were unlicensed and not activated, too. They worked for 30 days or so, then asked for activation and a serial key. Some worked longer than that and then deactivated themselves. It was chaos for the end users, but Microsoft spent money on buying new serial keys and licenses.