Because trainers modify game memory, many antivirus programs flag them as "False Positives." You may need to whitelist the trainer or temporarily disable your real-time protection.
Using a trainer in public multiplayer or online Zombies matches is strictly forbidden and will likely result in a permanent ban via Activision's anti-cheat systems. Always ensure you are in Offline Mode before activating any cheats. call of duty black ops cold war pc trainer fling