The program didn't have "Administrator" rights. Without them, it couldn't touch the system files it needed to emulate a 360 controller.

The year 2021 was a pivotal time for PC gaming. It saw the widespread adoption of Windows 10 and the initial rollout of Windows 11, alongside frequent updates to security patches like Microsoft Defender. This environment contributed significantly to the prevalence of Error Code 4 in three distinct ways:

Select the folder where your x360ce.exe application is located.

Self protection failed Error code: 4 · Issue #1567 - GitHub

The "Self Protection Failed Error Code 4" is a common issue typically encountered when using (Xbox 360 Controller Emulator) alongside games that utilize an "online fix" or specific crack modules. It generally indicates a conflict where the game's security or online module blocks the emulator's hooks . Quick Fixes

The "Self Protection Failed Error Code 4" is a frustrating roadblock, but it's rarely a permanent one. By working through the solutions in this guide, from running the program as an administrator to performing a clean boot and trying alternative software, you have a strong chance of resolving the issue. Remember to always ensure you have the latest version of x360ce and your drivers and to back up your controller configurations before making major changes. If you're still stuck, the wider x360ce community forums can also be a great source for getting specific help. Now, get back to your game!

Click on at the bottom of the page. Switch to the Program settings tab. Click Add program to customize > Choose exact file path . Navigate to your x360ce.exe file and select it.

This error often indicates that the application cannot hook into the game process or that security software is blocking it. While this error gained prominence around 2021, particularly in pirated games or online fixes (like Phasmophobia or Steamworks fixes), the solution remains relevant for modern Windows 10/11 systems in 2026.

Outdated drivers can cause this error. Here’s how to update them manually:

Users experiencing the Self Protection Failed Error Code 4 x360ce 2021 may encounter the following symptoms: