Information

If your antivirus 'swears' at the MuOnline client files and considers some of them as a virus or suspicious and deletes them, then add reported client files to the antivirus exceptions.

Game files are not dangerous and do not pose a threat to your computer.

If your game client closes after launch, try this:

1. Change the screen resolution in the launcher settings

   Go to the launcher, open the settings, and manually set:
   • Resolution: 800x600
   • Color Depth: Max Color (32 Bit)
   Then click Save.

2. Try compatibility mode

   Right-click the launcher → Properties → Compatibility → Run in compatibility mode for Windows 7 or 8.

3. Run the launcher or main.exe as Administrator

   Right-click the file → Run as administrator.

If your game client shows a Plugin CRC error after startup, try this:

4. Install both Visual C++ packages

   Inside the folder Client\Scripts\Libraries, make sure you install both:
   • VC_redist.x64.exe
   • VC_redist.x86.exe
   These are required to run the game.