SSM will take system backups once a week. These are stored on the 2nd partition drive in the SSM backup folder:
To roll back to one of these backups, modify the .ini file here:
C:\Program Files\Wisenet\SSM Server\ServiceManager\config.ini
So that the USE_RESTORE_TAB field equals 1 e.g:

Then reboot the server
In Service Manager, you will then see a Configuration Restore tab

From here you can select a previous back up to roll back to
The services will restart and load the previous back up