Thanks for the post back. The next suggestion would have been to use DISM to check for your install having corrupted files and repair it. Glad hearing things are back to normal again for you.
I have personally never had a legitimate install of Windows nailed by Norton as not being genuine. When you said:
If I go back to a backup from 1/12/33 and don't update to 22.23.10.10 everything is fine.
Are you referring to a system restore to another date before you installed Norton version 22.23.10.10 ? Does Norton have anything in its history indicating that it detected a illegitimate install of Windows before you reverted?
You can also disable norton when you activate windows and see if that helps and then activate it agian after and see if that works when it is that short time ther is problerly nothing ther can happen or disable the vpn