Real-time protection, tamper protection & third-party AV
Antivirus software blocks files it does not recognize — and the loader is a freshly compiled binary, so every AV flags it. If real-time protection is on, the loader gets quarantined the moment it launches and the game never starts.
This is a hard requirement. The loader will not run while any antivirus is actively scanning in real time.
Open Windows Security from the Start menu.
Go to Virus & threat protection → Manage settings (under Virus & threat protection settings).
Note: Windows will show a yellow warning banner — that is normal. It will stay off until the next restart or until you turn it back on.
Some Windows builds turn real-time protection back on automatically a few minutes later. That is caused by Tamper Protection.
Go to Device security → Core isolation → Security intelligence updates… actually, the correct path is:
Virus & threat protection → Manage settings → Tamper Protection
Turn Tamper Protection to Off first, then turn off real-time protection. This stops Windows from silently re-enabling it while you play.
Instead of leaving AV off all the time, you can add the loader's folder to the exclusion list. The loader still works, and the rest of your PC stays protected.
Go to Virus & threat protection → Manage settings → Exclusions → Add or remove exclusions.
Add the folder where you extracted the loader (for example your Downloads folder or wherever you unpacked it). Use Folder as the exclusion type.
If you use a third-party AV (Norton, McAfee, Avast, AVG, Bitdefender, Malwarebytes, Kaspersky, Webroot, etc.), Defender being off is not enough — the third-party AV still blocks the loader.
When in doubt, the cleanest option is to temporarily quit the antivirus (right-click its tray icon → Exit) for the session.