At first I thought it was a Norton issue, and then I changed those parameters and it kept happening. Then whenever it occurred - every couple hours or so - I saw that the game was updating, so I set it not to update automatically. This time when it DC’d I noticed that it wanted to Update.
This seems like something related to the latest patch because it never happened before. And the game seems to be eternally update-happy now, which may mean you changed parameters and its messing with my install AND seems problematic on many levels. Maybe try having a stable platform except for scheduled maintenance?? Hmm???