Additional feature autoinstall?

I have Norton Antivirus, and that's the only reason I can guess this might be ok, but my computer is wanting me to "Restart to finish installation" of Norton Identitysafe.  I never installed identitysafe, nor do I care to have it installed.  Did Norton Antivirus do this without my asking for it, or could this be some sort of bug my computer has picked up?  Is there a way to tell?  Right now I'm a little afraid to shut off or restart my computer in case this is a virus and not a real Norton program.