Hello BillyJean,
You may use AexPatchUtil.exe that is placed on computers running the Software Update Agent.
AexPatchUtil.exe command line options are descrbed here: http://www.symantec.com/docs/HOWTO9770
In your case execution of "aexpatchutil.exe /reboot" on affected client will invoke computer restarting in case if restart is required.
Also you may modify Restart schedule in Software Update Plug-in policy. After this policy is applied to target computers, restart will be invoked by defined schedule if required.
In order to get notification, you should make sure that notification is enabled and configured in Notifications tab of Software Update Plug-in policy.
Thanks,
Roman