[lmikle]

Да работает, вроде, все...
Во немного поправленный твой код (с привязкой к моим файлам)...

Код:

echo Create temporary folder
MD D:\MyTemp
echo Copy files to the temporary folder
copy C:\Demo\autoexec.bat D:\MyTemp
copy C:\Demo\config.sys D:\MyTemp
echo Show list files in the temporary folder
dir D:\MyTemp
pause
echo Rename files to *.bak
REN D:\MyTemp\*.* *.bak
echo Show list files in the temporary folder
dir D:\MyTemp
pause
echo Delete *.bak from the temporary folder
del D:\MyTemp\*.bak
echo Show list files in the temporary folder
dir D:\MyTemp
pause
echo Delete temporary folder
rd D:\MyTemp
echo Show list files in the disk root
dir D:
pause