[alpap]

Код:

@echo off
set "d=C:\papka"
set "ext=txt"
set n=10

for /d /r "%d%" %%a in (*) do (
 setlocal
  pushd "%%a"
   for %%a in (*.%ext%) do set /a n+=1& call :# "%%a" "%%n%%%%~xa"
  popd
 endlocal
)
pause& exit
 
:#
 ren "%~1" "%~2"
 >"%~2" echo Операция с "%~2"
 ren "%~2" "%~1"
exit /b