I recently started playing pc games and everytime I play, whether I turn off my antivirus and firewall or not, my .dll file gets labeled as a Trojan or quarantined. This disables the game and I have to find the file and re-copy it. It's just annoying.
How do you take a quarantined item or any file, and put it into the TRUSTED FILE?
Unfortunately there is no other way than white-listing the file that is being falsely detected by McAfee. Please follow instructions in above reply so as to white-list the said dll file. Please post back the version details of McAfee to see if we can exclude the file from Real Time Scanning provided yours being the Latest Security Suite. To check Version Open GUI > Click on About link at the bottom right. Paste here the version information for proceeding further.
If it were me I would upload the file to VirusTotal and see if it's just McAfee detecting a problem.
Pure coincidence perhaps but this is the second post about a Steam download being quarantined by McAfee. Not Supreme Commander by any chance?