Game Commands

Launch issues

Streamer Partnership

1. Basic checks

• Antivirus and Firewall
  → Add your game folder to the exception list. Antivirus software often blocks main.exe or launcher.exe.

• Run as Administrator
  → Right-click main.exe → Run as administrator.

• Compatibility
  → On Windows 10/11 try compatibility mode with Windows 7 or XP.

2. Verify game files

• Use the Launcher (Launcher.exe) to check and update the client.

• If the launcher doesn’t work:

  • Download the latest Patch from the server’s website.

  • Make sure your client version matches the server version.

3. DirectX and drivers

• Install or reinstall DirectX 9.0c (still required even on Windows 10/11).

• Update your graphics card drivers (NVIDIA / AMD / Intel).

• Install Microsoft Visual C++ Redistributables (2008–2015) if missing.

4. Network problems

• Disable VPN/Proxy (some servers block them).

• Check if your router or ISP blocks the server’s ports.

• Try wired internet instead of Wi-Fi.

5. Common errors

• Game Guard / Anti-Cheat error
  → Delete the contents of Data/Guard folder and restart the launcher.

• Black screen on launch
  → Enable windowed mode in the Launcher settings.

• "Main.exe not found" or crash at start
  → Damaged client — re-download from the official server website.

6. Last resort

If nothing helps:

• Uninstall the game completely.

• Delete the installation folder.

• Download a fresh client from your server’s official website (different servers use different, incompatible clients).

7. System Components (VC Redistributables)

Many MU Online clients require Microsoft runtime libraries to start correctly. If your game does not launch or you see errors such as “missing MSVCP.dll” or “main.exe stopped working”, you need to install Visual C++ Redistributables and .NET Framework.

• Download package:
  VC_Redistributables (146 MB, MediaFire)
• Extract the archive to any folder (for example C:VC_Redistributables).
• Run install_all.bat as Administrator — it will install all necessary Visual C++ and .NET components automatically.
• Wait until the message “All installations completed.” appears, then close the window.

This step ensures that all system runtimes (2005 – 2022 x86/x64 and .NET Framework 3.5 / 4.0) are correctly installed, preventing crashes and missing-DLL errors when starting the game.