Error 1312

I set up a new laptop last week, and the last step took the longest. File Explorer would open my NAS, ask for a login, and then fail with this message: A specified logon session does not exist. It may already have been terminated. That is Windows error 1312. This post is the fix that worked for me, and the setup that led up to it. I wrote an older post about a NAS that wouldn’t connect because of a bad Wi-Fi driver. This one is a different cause. ...