When you have multiple users with no password, when you restart you are automatically signed in on the last user used, instead of letting you choose from the user list.
Cortana has become increasingly restrictive since Windows 10’s release. It was previously updated to ignore your default web browser. Cortana now always launches the Microsoft Edge browser and only uses Bing when you search. If that sounds like something you wouldn’t want to use, here’s how to turn it off.
Starting May 18, 2021, the Windows 10 May 2021 Update (21H1) is officially available, and you can upgrade your computer to the latest version manually whether it has version 20H2, 2004, 1909, or an older release.