It seems like it didnt post what i wrote.
To deactivate the real time scan of mcafee simply right click on the mcafee icon on the right side oft he task bar. Somewhere in the menu you can find a point „real-time scan“ or german „Echtzeit Scan“, click on it and deactivate the scan.
Maybe you have to re-download the game because the .exe file has already been isolated, do that while the scan is deactivated.
If the download is finished, copy the.exe file on an usb drive ( so you can activate the scan after playin and dont have to re-download everytime you want to play)
Dont forget to unplug the usb drive before you activate the scan again, otherwise the your usb drive will be scanned and the .exe file will be isolated.