hey where the windows edition?
You don't have to turn off your antivirus, just choose "More Info" and then "Run Anyway." Microsoft displays that warning because the game hasn't been downloaded enough times for Microsoft to deem it trustworthy, but I promise it's safe.
By the way, if anyone else has this issue, please submit the setup file here: https://www.microsoft.com/en-us/wdsi/filesubmission/ so that Microsoft can review it and stop displaying this message.