Cause: After the grace period, Windows Product Activation does not shut down the computer, but it does prevent interactive logon. For example, if the computer or its service is running on the 30th day, it will continue to run on the 31st day if the computer is not activated and not rebooted. On the next reboot and login, the user will be blocked from logging on.
Solution: The user can still boot into the Safe Mode minimum (without networking) to activate, upgrade, or simple retrieve data.