Script to rename Windows system to serial number

rename.bat

@echo off
for /F "skip=1 delims=" %%j in ('wmic bios get serialnumber') do (
  set SERIAL=%%j
  goto :DONE
)
:DONE
   
set src=%SERIAL%&set DummyForSpacesAtTheEnd=x 
echo [%src%] 
for /f "delims=" %%A in ('echo %src%') do call :Sub1 %%A 
echo [%src%] 

:Sub1 
set src=%* 
 
wmic ComputerSystem where Name="%COMPUTERNAME%" Rename Name=%src%

shutdown /t 30 /r /f