For /F "Delims=" %%K In (Temp\Folders.txt) Do (
  If Exist "%%K\Files\shell32.dll" GoTo :Next
)

If Exist "%I386%\SHELL32.DLL" XCopy "%~1\CheckF\SHELL32.DLL" "%I386%\" /Q /R /Y >nul
If Exist "%I386%\SHELL32.DL_" (
  Del /F /Q "%I386%\SHELL32.DL_"
  MakeCab /D CompressionMemory=21 /D CompressionType=LZX /L "%I386%" "%~1\CheckF\shell32.dll" SHELL32.DL_ >nul
)

:Next
