@echo off&setlocal
set E=
:MAIN
set N=
pushd "%~1" || pause&exit /b
for %%a in (*) do set "N=%%~na"&goto :BR
:BR
popd
if defined N (ren "%~1" "%N%") else set /a "E+=1"&echo err:"%~1"
shift
if exist "%~1" goto :MAIN
if defined E pause