update.bat

@ECHO off

CHCP 65001 > NUL

REM  --> Check for permissions
    IF "%PROCESSOR_ARCHITECTURE%" EQU "amd64" (
>nul 2>&1 "%SYSTEMROOT%\SysWOW64\cacls.exe" "%SYSTEMROOT%\SysWOW64\config\system"
) ELSE (
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"
)

REM --> If error flag set, we do not have admin.
if '%errorlevel%' NEQ '0' (
    goto UACPrompt
) else ( goto gotAdmin )

:UACPrompt
    echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
    set params = %*:"=""
    echo UAC.ShellExecute "cmd.exe", "/c ""%~s0"" %params%", "", "runas", 1 >> "%temp%\getadmin.vbs"

    "%temp%\getadmin.vbs"
    del "%temp%\getadmin.vbs"
    exit /B

:gotAdmin
    pushd "%CD%"
    CD /D "%~dp0"

CD /d "%~dp0"

IF EXIST %SYSTEMROOT%\py.exe (
    CMD /k %SYSTEMROOT%\py.exe -3 update.py
    EXIT
)

python --version > NUL 2>&1
IF %ERRORLEVEL% NEQ 0 GOTO nopython

CMD /k python update.py
GOTO end

:nopython
ECHO ERROR: Python has either not been installed or not added to your PATH.

:end
PAUSE