Use tip 5609 » How do I assign scripts in Windows to assign a startup script to each PC in the domain.

To make every user that logs onto the domain a local administrator of the PC they logged on from, the start script should contain:

                              @echo off                              setlocal                              set OK=N                              for /f "Tokens=*" %%a in ('%SystemRoot%\system32\net.exe LOCALGROUP "Administrators" ^|%SystemRoot%\system32\find.exe /i "NT Authority\Interactive"') do (                               set OK=Y                              )                              If "%OK%" EQU "N" %SystemRoot%\system32\net.exe LOCALGROUP "Administrators" "NT Authority\Interactive" /ADD                              endlocal