Ref. this topic
Because the issue has recurred, it seemed appropriate to start a new topic rather than to continue the discussion in a thread that began with another (though similar) topic.
Tonight we were watching TV when, all of a sudden, the screen froze with Jeopardy’s Ken Jennings in the middle of a sentence. Right away I knew it was Norton, since the problem started at 9:29/9:30 PM our time – the same time of night when the problem with nIItools.exe (from the other thread) was happening.
We had to wait for six minutes for the accursed su_worker.exe process to end, so that I could actually get in and see what the RAM usage was. When I finally managed to get back to the Windows desktop, the Task Manager Deluxe graph was showing RAM usage during the recent frozen minutes approaching 100%.
Days ago, I had deleted from Norton’s Software Updater list all the applications that it had listed. I thought that emptying the list would give Software Updater the idea that there was no software for which to look for updates, such that SU wouldn’t run and the RAM hogging problem would disappear. Apparently not. 
Is there a way to disable Software Updater completely so that it simply never runs? Or barring that, is there a way that I as the customer can tell N360 to run Software Updater at a different time when we are not using the computer?
Norton tech support team: I created an N360 log file as soon as I got the chance to, and can send it to you via Dropbox or WeTransfer.