SQL
Find SQL servers with powershell
[System.Data.Sql.SqlDataSourceEnumerator]::Instance.GetDataSources()
browser agent must be running
getting access to
Add .\administrators to sql administrators
sqlcmd -Q "if not exists(select * from sys.server_principals where name='BUILTIN\administrators') CREATE LOGIN [BUILTIN\administrators] FROM WINDOWS;EXEC master..sp_addsrvrolemember @loginame = N'BUILTIN\administrators', @rolename = N'sysadmin'" –S ComputerName\InstanceName
or run in single user mode
sqlservr -m
or run management studio as system using psexec
PsExec -s -i "C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\Ssms.exe"