NSBU is hogging my system

At random times, my system just locks up with the disk activity light on solid, and when I can get the task manager to load, the disk activity shows it is pegged at 100%.  When I check the resources and look at what is the most active process, it is nsbu.exe.  I don't have anything scheduled to run, so I'm not sure what Norton Securities could be doing on my disk to take over my system the way it is, but it really curbs my ability to do anything and is really getting frustrating.

I'm at version 22.9.1.12.

Anybody have thoughts on where I can look to find out what's going on?

Thanks!

Tom