How to Fix Error Code 0x40009 on Windows?

[AngelinaFi]

I recently encountered the 0x40009 error code while updating my Windows system. Does anyone know what causes this issue and how to resolve it effectively? Any step-by-step fix or tool recommendation would be appreciated!

 

[Gsusangrey]

Error code 0x40009 typically indicates a Graphics Exception from an Nvidia driver or Easy Anti-Cheat (EAC) software in games like Hunt: Showdown.

To correct it:

• For gaming (EAC): shut down any background macro or overlay programs (such as AutoHotKey) and use Steam or the launcher to confirm the integrity of the game files.
• For General Graphics: Update/reinstall your graphics driver (NVIDIA), check for Windows updates, and consider disabling any CPU/GPU overclocking.