Set time (in seconds) to force reboot This policy setting configures the amount of time (in seconds) that the operating system waits to reboot in order to enforce a change in access rights to removable storage devices. If you enable this policy setting, you can set the number of seconds you want the system to wait until a reboot. If you disable or do not configure this setting, the operating system does not force a reboot. Note: If no reboot is forced, the access right does not take effect until the operating system is restarted.

(1) GPO: User Configuration\Administrative Templates\System\Removable Storage Access!Set time (in seconds) to force reboot (2) REG: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\RemovableStorageDevices!RebootTimeinSeconds_state