Right-click x360ce.exe → Run as administrator. This gives it permission to write DLLs and hook into processes.
Try an older version of x360ce (v3.2.10 or earlier) — the 2021 version has stricter self-protection checks. Some users report success with x360ce v4.15.18.0 instead of the 2021 branch. 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. Right-click x360ce