Today Oct 13, Microsoft released a standard Win10 fix KB3097617.
After installing this, rebooting, then launching IE (or Chrome) ... when clicking on the Vault Toolbar icon and after entering my valid credentials... it would return to "connecting to Server and then re-prompt me for my credentials. It would not show the browser enabled ... just kept asking for the password.
After several reboots and re-attempts I uninstalled the Win10 fix KB3097617 to see if this was the culprit and sure enough after removing KB3097617 I'm able to log on again.
As a best practice I'd like to keep current and reinstall KB3097617 if anyone has figured out what will be needed to run KB3097617 without breaking Norton Identity Safe.
Any clues?