microsoft defender smartscreen prevented an unrecognised app from starting

This will give you the options to control SmartScreen from block which is what you’ll want to change, to off which I most certainly do not recommend. Search in the Start Menu for SmartScreen and open the App & browser control option when it appears. On some PCs though even this option is blocked, but you can fix this. If you really do want to run the software, click the More info link that you’ll see near the top left of the SmartScreen dialog and a Run anyway button should appear for you. The service that does this is called Windows Defender SmartScreen, and when it blocks something from running you will see a solid colour dialog in the centre of your screen saying Windows protected your PC. Sometimes though you will be faced with a situation where Windows 10 stops you from running a perfectly legitimate software package that you actually need.

This is why downloading software from Torrent websites is always a bad idea, as malware is commonly distributed this way.

If you download a program or app from the Internet you need to certain that it’s safe to use, and isn’t malware or has been modified to carry a malware payload.

Microsoft defender smartscreen prevented an unrecognised app from starting