@echo off
title Thay the file hosts Windows - Auto Run

:: Tu dong kiem tra va chay voi quyen Administrator
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"
if '%errorlevel%' NEQ '0' (
    echo Requesting administrator privileges...
    goto UACPrompt
) else ( goto gotAdmin )

:UACPrompt
    echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
    echo UAC.ShellExecute "%~s0", "", "", "runas", 1 >> "%temp%\getadmin.vbs"
    "%temp%\getadmin.vbs"
    del "%temp%\getadmin.vbs"
    exit /B

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

cls
echo =============================================
echo    TU DONG THAY THE FILE HOSTS WINDOWS
echo =============================================

set HOSTS_FILE=%SystemRoot%\System32\drivers\etc\hosts
set TEMP_FILE=%TEMP%\hosts_new_%RANDOM%.txt

echo Dang xu ly file hosts: %HOSTS_FILE%

:: Tu dong tao backup
copy "%HOSTS_FILE%" "%HOSTS_FILE%.backup.%date:~6,4%-%date:~3,2%-%date:~0,2%" >nul 2>&1
echo [OK] Da tao backup file hosts

:: Tao noi dung moi
echo # Copyright (c) 1993-2009 Microsoft Corp. > "%TEMP_FILE%"
echo # >> "%TEMP_FILE%"
echo # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. >> "%TEMP_FILE%"
echo # >> "%TEMP_FILE%"
echo # localhost name resolution is handled within DNS itself. >> "%TEMP_FILE%"
echo 127.0.0.1       localhost >> "%TEMP_FILE%"
echo ::1             localhost >> "%TEMP_FILE%"
echo. >> "%TEMP_FILE%"
echo # Custom entries - Them cac entry tuy chinh o day >> "%TEMP_FILE%"
echo # 127.0.0.1       example.com >> "%TEMP_FILE%"
echo # 127.0.0.1       www.example.com >> "%TEMP_FILE%"

:: Thay the file hosts
copy "%TEMP_FILE%" "%HOSTS_FILE%" >nul 2>&1
if %errorlevel% equ 0 (
    echo [OK] Da thay the file hosts thanh cong!
) else (
    echo [LOI] Khong the thay the file hosts!
    del "%TEMP_FILE%" >nul 2>&1
    exit /b 1
)

:: Don dep
del "%TEMP_FILE%" >nul 2>&1

:: Clear DNS cache
ipconfig /flushdns >nul 2>&1
echo [OK] Da clear DNS cache

echo.
echo [HOAN THANH] File hosts da duoc thay the tu dong!
echo File se tu dong dong sau 2 giay...
timeout /t 2 /nobreak >nul

exit /b 0