I highly recommend to not leave your 'Real Time Scanner' turned off. Kindly follow these Guidelines/Instructions to resolve your issue. What To Do When McAfee Detects Software As An Infection - How to Submit To McAfee Labs & Appeal
I might add, there is a feature with-in the software that allows you to exclude 'Files/Folders'. However until McAfee has deemed them to be safe , they will be detected. By submitting this application/program to McAfee Labs , they will be Analyzed/Processed. In the majority of cases especially (Game oriented) Minecraft/Steam usually get suppressed.
Wishing you all the Best,
This has been escalated also. Ticket #: AM000601 - False Artemis!
I hope you found this to be 'Helpful'