After using NSS backup, Windows backup disabled

I used to use "Control Panel\Backup and Restore Center" in my Vista 64, SP2 Premium. After using NSS backup, the options within the control panel are no longer available, ie the "Control Panel\Backup and Restore Center" panel has no option to configure or start any windows backups.

 

How can I turn these back on? Disabling NSS backup had no effect.