@echo off
:start
    cls
    echo Wait how many hours until shutdown?
    echo (next input is minutes)
    echo (set 0 to skip hours)
    set time=Hours Input:
    call :setvar
    call :hours
    echo Wait how many minutes until shutdown?
    echo (next input is seconds)
    echo (set 0 to skip minutes)
    set time=Minutes Input:
    call :setvar
    call :minutes
    echo Wait how many seconds until shutdown?
    echo (set 0 to skip seconds)
    set time=Seconds Input:
    call :setvar
    call :seconds
    cls
    echo Waiting for confirmation
    echo Set %hs% hours to wait
    echo Set %ms% minutes to wait
    echo Set %s% seconds to wait
    echo.
    echo Unformatted Hours   = %h%
    echo Unformatted Minutes = %m%
    echo Unformatted Seconds = %s%
    echo.
    choice /n /c:SE /m "Press [S] to start/Press [E] to exit"
    if %errorlevel% EQU 1 (goto timer) else (exit)
:timer
    cls
    echo Counting down...
    echo Waiting for %hs% hours
    echo Waiting for %ms% minutes
    echo Waiting for %s% seconds
    echo.
    echo Unformatted Hours   = %h%
    echo Unformatted Minutes = %m%
    echo Unformatted Seconds = %s%
    echo.
    echo Press any key to skip, close window to stop
    if %h% NEQ 0 (timeout %h%)
    echo Completed or skipped hours
    if %m% NEQ 0 (timeout %m%)
    echo Completed or skipped minutes
    if %s% NEQ 0 (timeout %s%)
    echo Completed
    shutdown -s -t 1
    exit
:setvar
    set /p a=%time%
    echo.%a%| findstr /R "[^\/()_a-zA-Z0-9%% $]" >nul 2>&1
    if errorlevel 1 (cls) ELSE (goto invalidnum)
    SET "var="&for /f "delims=0123456789" %%i in ("%a%") do set var=%%i
    if defined var (goto invalidnum) else (cls)
    exit /b
:invalidnum
    cls
    echo You entered an invalid number or included a non number
    echo Sending you back to the start...
    pause
    goto start
:hours
    set /a h=%a%*60*60
    set /a hs=%h%/60/60
    exit /b
:minutes
    set /a m=%a%*60
    set /a ms=%m%/60
    exit /b
:seconds
    set /a s=%a%
    exit /b