If you previously used an older x360ce (pre-2020), your folder is likely polluted.
.exe or game files.x360ce.exe into the clean folder.Additional Tips
Conclusion
By following these steps, you should be able to resolve the Self Protection Failed Error Code 4 with x360ce in 2021. If the issue persists, consider seeking help from the x360ce community forums or support channels. Happy gaming!
Important: After fixing, you can re-enable antivirus and Memory integrity – but you may need to repeat the admin run each time you use x360ce. self protection failed error code 4 x360ce 2021
Many users ask: "If Error Code 4 is so common, why doesn't the developer just fix it?" The irony is that the error is a security feature to protect your PC from malicious programs that try to replace x360ce with infected versions. The developer prioritizes your system's safety over convenience. Therefore, the "fix" must come from your operating system's permissions and antivirus settings.
If x360ce is inside C:\Program Files or C:\Program Files (x86), Windows UAC (User Account Control) locks file writing, triggering Error Code 4. If you previously used an older x360ce (pre-2020),
Solution: Move the x360ce executable to a user-writable folder.