I recently built two new systems. Both have ASUS X570-I mother boards, AMD Ryzen 9 3900X processors, 32GB Corsair Vengeance RAM, Corsair MP600 1TB M.2 , and MP510 480GB M.2. One is running and Nvidia 2060 and the other a Radeon 6800. Neither can launch any game via steam or the Epic games store that has Easy Anti Cheat. I'm guessing it's a software conflict but I have stopped every process I can think of, and can not find the cause. The Nvidia based system was able to launch and play Fortnite once, since then, when trying to launch it, I receive a "Failed to start" error. I have tried the EAC repair for each game affected to no avail. Any assistance/knowledge is greatly appreciated.