SQL Server cannot start after modifying system password

SQL Server 1069 error (Failed to start service due to logon failure) workaround

1. My Computer--control Panel--management tools--services--right key mssqlserver--properties--landing--Landing identity--Select "Local System Account"

2. My Computer--control Panel--management tools--services--right key mssqlserver--properties--landing--Landing identity--select "This Account"--Password and Confirm password to enter your modified administrator password.

The difference between the two:

Choose the first way, later modified the administrator password, no more adjustments (but require the system administrator to log on to the operating system)

Select the second way, later modified the administrator password, but also repeat the above operation.