@echo off
setlocal enabledelayedexpansion

rem Set size limit for input
set SIZE_LIMIT=2

:main_menu
cls
echo ==============================
echo    Windows Activation Script
echo ==============================
echo Select the Windows version to activate:
echo.
echo 1. Windows 10
echo 2. Windows 11
set /p version_choice="Enter your choice (1 or 2): "

rem Check input length
if "!version_choice!" neq "" (
    if "!version_choice:~%SIZE_LIMIT%!" neq "" (
        echo Input exceeds the size limit of %SIZE_LIMIT% characters.
        pause
        goto :main_menu
    )
)

if "%version_choice%"=="1" (
    call :activate_windows10
) else if "%version_choice%"=="2" (
    call :activate_windows11
) else (
    echo Invalid choice. Exiting...
    pause
    exit /b
)

goto :eof

:activate_windows10
cls
echo ==============================
echo   Windows 10 Edition Selection
echo ==============================
echo 1. Windows 10 Professional
echo 2. Windows 10 Enterprise
echo 3. Windows 10 Education
set /p win10_choice="Select the edition (1-3): "

rem Check input length
if "!win10_choice!" neq "" (
    if "!win10_choice:~%SIZE_LIMIT%!" neq "" (
        echo Input exceeds the size limit of %SIZE_LIMIT% characters.
        pause
        goto :activate_windows10
    )
)

if "%win10_choice%"=="1" (
    set key=W269N-WFGWX-YVC9B-4J6C9-T83GX
) else if "%win10_choice%"=="2" (
    set key=NPPR9-FWDCX-D2C8J-H872K-2YT43
) else if "%win10_choice%"=="3" (
    set key=NW6C2-QMPVW-D7KKK-3GKT6-VCFB2
) else (
    echo Invalid choice. Exiting...
    pause
    exit /b
)

echo Using key: !key!
slmgr /ipk !key!
set KMS_SERVER=kms.nerdtown.cc
slmgr /skms %KMS_SERVER%
echo KMS Server set to %KMS_SERVER%
slmgr /ato
pause
goto :eof

:activate_windows11
cls
echo ==============================
echo   Windows 11 Edition Selection
echo ==============================
echo 1. Windows 11 Professional
echo 2. Windows 11 Pro For Workstations
echo 3. Windows 11 Pro Education
echo 4. Windows 11 Education
echo 5. Windows 11 Enterprise
set /p win11_choice="Select the edition (1-5): "

rem Check input length
if "!win11_choice!" neq "" (
    if "!win11_choice:~%SIZE_LIMIT%!" neq "" (
        echo Input exceeds the size limit of %SIZE_LIMIT% characters.
        pause
        goto :activate_windows11
    )
)

if "%win11_choice%"=="1" (
    set key=W269N-WFGWX-YVC9B-4J6C9-T83GX
) else if "%win11_choice%"=="2" (
    set key=NRG8B-VKK3Q-CXVCJ-9G2XF-6Q84J
) else if "%win11_choice%"=="3" (
    set key=6TP4R-GNPTD-KYYHQ-7B7DP-J447Y
) else if "%win11_choice%"=="4" (
    set key=NW6C2-QMPVW-D7KKK-3GKT6-VCFB2
) else if "%win11_choice%"=="5" (
    set key=NPPR9-FWDCX-D2C8J-H872K-2YT43
) else (
    echo Invalid choice. Exiting...
    pause
    exit /b
)

echo Using key: !key!
slmgr /ipk !key!
set KMS_SERVER=kms.nerdtown.cc
slmgr /skms %KMS_SERVER%
echo KMS Server set to %KMS_SERVER%
slmgr /ato
pause
goto :eof