I have Norton Security with Backup (bundled with LifeLock Standard) installed on a desktop PC and on 5 other devices. In My Account Personal Settings, under Two-Factor Authentication, Trusted Devices, a message states that "This is not a trusted computer."
How do I get the device I use ALL THE TIME on the Trusted Devices list?
Norton Security with Backup
Windows 10


So you can try turning off 2FA, and choose the option to remove all methods. Then set up 2FA again from the device you will be using all the time.