SQL Server mistakenly deletes Windows logon user authentication method using Windows Authentication solution

See this article today: without the sa password, unable to log in as a Windows integrated identity, what about the DBA?

Remembered before the anxious brother asked me a question, a DBA deleted the Windows logged-on user and the SQL Server authentication is Windows authentication

What do you do?

The answer I gave him was: Reload the system database Master

See this article today without the SA password, unable to log on Windows integrated identity, what about the DBA? , there is a train of thought

Let's say we're having a bad situation.

SA is disabled, server authentication is in Windows Authentication mode, Windows logon user is deleted, no logged-on user for other sysadmin roles

Step One:

Shut down SQL Server: At command line net stop MSSQLSERVER