Next to this text is a checkbox labeled "Unblock." To proceed, the user simply checks this box and clicks "Apply" or "OK." In technical terms, this action strips the "Mark of the Web" alternate data stream from the file. Once this is done, the operating system treats the file as if it were created locally, allowing it to execute or open without restriction.
"Windows protected your PC. Microsoft Defender SmartScreen prevented an unrecognized app from starting." how to unblock a file
That is it. Double-click the file again, and it should open normally. Next to this text is a checkbox labeled "Unblock