When SQL Server is started, the system prompts that the service cannot be started due to login failure.

Problem description:
When SQL Server is started, the system prompts that the service cannot be started due to login failure.
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Cause:
Security
When installing SQL Server, the default login user is used as the startup SQL
Server Service account (for a single machine used by the user, it is usually the Administrator). When the user changes the user name (if someone prefers
Change to admin) or change its password. If you start the server again, the error "cannot start the service due to logon Failure" appears.
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Solution:
1. Change the user password back to the original one, and then start the service.
2. Use the Service Manager of the Control Panel to find the MSSQLServer service, change the startup account information, change it to the changed one, and then start the service.
3,
It is also recommended to create a new user dedicated to starting the SQL Server service. This user is used to start the SQL Server
Server to avoid the 1069 error caused by frequent changes to the administrator password. If you have installed SQL
You can also change the service account information of the MSSQLServer service under the service manager of the Control Panel to a user dedicated to the SQL service.