NET START MSSQLSERVER /f /T3608
or
NET START MSSQL$instancename /f /T3608
use sqlcmd commands or SQL Server Management Studio to run the following statement.
ALTER DATABASE database_name MODIFY FILE( NAME = logical_name , FILENAME = 'new_path\os_file_name' )
use database_name
select file_name(1)
NET STOP MSSQLSERVER
NET START MSSQLSERVER.
