If you cannot access your Microsoft SQL Server because you do not have the sa password, this will help you.
Commands from this video:
NET STOP MSSQLSERVER
NET START MSSQLSERVER -m
SQLCMD
CREATE LOGIN admin WITH PASSWORD = 'password1234*'
go
SP_ADDSRVROLEMEMBER admin, 'SYSADMIN'
go
ALTER SERVER ROLE SYSAMDIN ADD MEMBER admin
go
NET STOP MSSQLSERVER
NET START MSSQLSERVER
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