Self Protection Failed Error Code 4 X360ce 2021 Free May 2026

Troubleshooting the "Self Protection Failed" Error Code 4 in x360ce (2021)

How to use this post:

  1. Copy the text above.
  2. Paste it into the forum or support channel.
  3. Fill in the bracketed information (like your controller name and OS version).
  4. Attach a screenshot of the error if possible, as it helps developers diagnose the issue faster.

Still Getting Error 4?

| If you have… | Try this… | |--------------|-------------| | Controller working in other software | Use Input Mapper or DS4Windows instead | | Only need basic mapping | Use Steam Input or JoyToKey | | Windows 11 with latest update | Roll back Windows update or use ViGEm Bus Driver manually | self protection failed error code 4 x360ce 2021

  1. Confirm x86/x64 match.
  2. Run as Admin.
  3. Disable AV temporarily and retry.
  4. Close other input utilities.
  5. Check game anti-cheat — avoid using x360ce with active anti-cheat.
  6. If unresolved, use a hardware controller or configured Steam Input.

If you’ve encountered the "Self protection failed error code 4" while using x360ce in 2021 or later, you're not alone. This error typically occurs when the application’s built-in security or verification routine is blocked or corrupted, preventing the emulator from launching or communicating with your game. Troubleshooting the "Self Protection Failed" Error Code 4

  1. Delete all current x360ce files.
  2. Download x360ce_3.2.9.1.zip from a reputable archive (e.g., GitHub or x360ce.com's legacy section).
  3. Extract and run as Administrator. Version 3 does not have Error Code 4.

Some users have resolved this by blocking the application's connection in the firewall to prevent it from triggering "protection" checks that fail. Windows Defender Firewall Advanced Settings Inbound Rules and browse to your x360ce or game executable. Block the connection Complete the wizard and restart the app. 3. Adjust Folder Permissions Copy the text above

  1. Windows Security Enhancements: In 2021, Microsoft strengthened Controlled Folder Access (part of Windows Defender). This ransomware protection blocks untrusted programs from writing to critical folders (like Documents, Downloads, or game installation folders).
  2. Driver Signature Enforcement: Windows 10/11 updates increased kernel-level security, making it harder for x360ce’s virtual driver (ViGEm Bus Driver) to install cleanly.
  3. Corrupted User Profiles: Many legacy x360ce users had old .ini or .dll files from versions prior to 2020. These legacy files conflict with the new "self protection" logic.
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