I've noticed that Win10, perhaps other Windows version too, up to Vista, shows up a warning by executing the installer of KMX 3.0. I'm not sure if this is a warning with this particular, otherwise freeware, installer. Furthermore, I didn't get this warning under Win XP and I would like to say that I didn't get this warning under older, not update-pumped up, Win10 (2016) versions either. You can lower the level of the User Account Control and the warning should be gone permanently, because you are a professional user. Or you better choose to "install anyway" while the warning appears. In a nutshell: it's up to Windows. Try at your own risk.