@echo off

:ASK
SET /P IN=Are you sure you'd like to empty your entire recycle bins? [y/n]
goto CHECKIN

:ASKAGAIN
echo Wrong input, please type y/n as answer.
goto ASK

:CHECKIN
IF /I "%IN%"=="y" goto CLEARBIN
IF /I "%IN%"=="n" goto CANCEL
IF [%IN%]==[] goto ASKAGAIN

::Check input is exactly "y" or "n"
echo %IN% | findstr /r "^[^yn]*(y|n){1}[^yn]*$*" >nul 2>&1 && (echo []) || (goto ASKAGAIN)

:CLEARBIN
echo Emptying system recycle bin...
rd /s /q %systemdrive%\$Recycle.bin
echo Ready emptying system recycle bin!
echo Emptying desktop recycle bin...
rd /s /q D:\$Recycle.bin
echo Ready emptying desktop recycle bin!
echo ===================================
echo All recycle bins emptied!
goto END

:CANCEL
echo Canceled emptying recycle bin.
goto END

:END
pause