@echo off
setlocal enabledelayedexpansion
FOR /F "tokens=1,2,*" %%A IN ('ipconfig /all ^| find "Ethernet adapter"') DO (
    set name_tmp=%%C
    set interface_name=!name_tmp:~0,-2!
    set /p yesno=!interface_name!のDNSを変更しますか？[y/n]:
    if !yesno!==y (
        echo 設定変更開始
        echo DNS-1
        netsh interface ip set dns name="!interface_name!" source=static addr=192.168.1.1 register=PRIMARY
        echo DNS-2
        netsh interface ip add dns name="!interface_name!" addr=192.168.1.2 index=2
        echo WINS-1
        netsh interface ip set wins name="!interface_name!" source=static addr=192.168.1.1
        echo WINS-2
        netsh interface ip add wins name="!interface_name!" addr=192.168.1.2 index=2
        echo 設定変更完了
    )
)
endlocal
pause


これでDNSが変更できない理由わかる？(;´Д`)