@echo off
Title .NET Framework 3.5 Offline Installer
for %%I in (D E F G H I J K L M N O P Q R S T U V W X Y Z) do if exist "%%I:\\sources\install.wim" set setupdrv=%%I
if defined setupdrv (
    echo Found drive %setupdrv%
    echo Installing .NET Framework 3.5...
    Dism /online /enable-feature /featurename:NetFX3 /All /Source:%setupdrv%:\sources\sxs /LimitAccess
    echo.
    echo .NET Framework 3.5 should be installed
    echo.
) else (
    echo No installation media found!
    echo Insert DVD or USB flash drive and run this file once again.
    echo.
)