rename.cmd

@echo off
if "%1" == "elevated" goto start
powershell -command "Start-Process %~nx0 elevated -Verb runas"
goto :eof

:start
		
	@echo off
	cls
	
	CALL :HEAD	
	CALL :COMPUTERNAME
	CALL :SERVICETAG
	
	SET SERVICETAG=%SERVICETAG:~0,7%
	
	echo.
	echo Computer Name: 		%COMPUTERNAME%
	echo Service Tag: 		%SERVICETAG%
	echo.
	
	echo.
	choice /M "Rename and reboot [R], or Quit [Q]" /C RQ
	echo.
	
	if %ERRORLEVEL% == 1 ( CALL :RENAME )
	if %ERRORLEVEL% == 2 ( goto :eof )
	
	goto :start
	
	
:HEAD
	cls
	echo.
	echo Rename Helper
	echo =============
	echo.
	goto :eof
	
:COMPUTERNAME
	for /f "skip=1" %%i in ('wmic computersystem get name') DO (	
		SET COMPUTERNAME=%%i
		goto :eof
	)

:SERVICETAG
	for /f "skip=1" %%i in ('wmic bios get serialnumber') DO (	
		SET SERVICETAG=%%i
		goto :eof
	)
	
:RENAME
	powershell -Command "Rename-Computer -NewName %SERVICETAG% -Restart"
	goto :eof