Most players encounter this error because Windows Defender or third-party antivirus software silently quarantines FC_m64.dll . Open via the Start menu. Navigate to Virus & threat protection > Protection history .

Modern antivirus loves to quarantine fcm64.dll because it reads game memory (anti-cheat behavior). This is especially aggressive on .

Follow these verified steps sequentially to pinpoint and resolve the underlying issue. 1. Check Antivirus Protection and Windows Defender