There are 2 types of reminder:
When the "Windows log off or shut down" reminder setting is enabled, a backup confirmation menu will be prompted, requesting for backup before the user logs out the system or before shutting down Windows.
The "remind me to backup when last backup is over my tolerance period" reminder is designed for notebook users who may be off-line most of the time, and cannot rely on backup schedule for regular backup of their data. When the computer is connected online, if the time between the last backup to the current time elapsed is over the tolerance period, a backup confirmation menu will be prompted, reminding user to perform a backup.
The reboot option is available on 2003, XP, 7, 2008 and 2012.