[edgarvaldes]

I actively avoid using a MS account on my local Windows machines. Until last week when I logged into Teams and Windows activated that account as the Windows account on the next boot. The problem is: I was using my wife's laptop. I dunno how to remove the account without creating more problems.

[orev]

This is one of the most insidious parts of the Microsoft Account. Windows and other apps (from Microsoft) are littered with booby traps where if you sign in on one of them, it’s irrevocable and automatically attaches the account to all the other apps and Windows. You can’t feel safe anymore because there are land mines all over the place.

[zozbot234]

Do you have a "switch to local account" option in Windows's accounts settings screen? That would be the cleanest option if available.