I did a bit more research and apparently there is something called Smartscreen that some people have enabled on their computers. I still don't completely understand it, except that it's nothing but a huge nuisance and should be turned off as soon as possible. Are you using Explorer/Edge by any chance? It seems like most results I found in my search related to people using those browsers. Or maybe you're using Winows 8? (the worst operating system ever made) I see a lot of issues with that related to Windows 8 as well. In any case, rest assured that it has to do with settings on your own computer, and it's Microsoft's fault. I don't know how many people have this thing enabled, but I haven't heard of any problems with people trying to play my games yet, so probably most people know how to shut it off or get around it or don't have it active. (it's deactivated in Windows Defender settings I think)