Nope! Uninstall it; if it ain't doin'what its supposed to do what's the point of hanging onto it?
See another thread where I describe how it was NIS that corrupted the Winsock set-up on a LAN I was servicing. As soon as I uninsalled NIS, things returned to normal. "Digitalis" did the same and got the same successful result.
When I catch up with myself, I'm going to contact Symantec and get them to comment on this.