by Microsoft
Step 1 - Make sure at least 2 users in place
Launch "netplwiz" as Administrator,
If only one user is in place, create another one, whatever it's a local user or a Domain User.
Step 2 - Enable User Switching
Launch "regedit" app, browse to: HKEY_LOCAL_MACHINE -> SOFTWARE -> Microsoft -> Windows -> CurrentVersion -> Policies -> System,
Then look for a entry named "HideFastUserSwitching". If not found, create a new "DWORD-32 Value" key, and set the value to "0".
Alternatively, launch "gpedit.msc" app, browse to: Computer Configuration -> Administrative Template -> System, Then find an entry of "Hide entry points for fast User Switching", set the value to be "Disabled".
Step 3 - Enable Multi-Users Online in the Same Time
Launch "regedit" app, browse to: HKEY_LOCAL_MACHINE -> SOFTWARE -> Microsoft -> Windows -> CurrentVersion -> Authentication -> LogonUI -> UserSwitch,
Look for a item named "Enabled", make sure the value is "1".
Alternative - Quick Switcher
Create a shortcut on Desktop, pointing to "C:\Windows\System32\tscon.exe".
If All above don't work out
- Update your Windows 11 system
- Run as Administrator to open Command Line Prompt and run: sfc /scannow.