Windows Defender Smartscreen Prevented An Unrecognized App From Starting. Windows Defender's SmartScreen often blocks third-party apps. The message you observed is a notification from Windows Defender SmartScreen indicating that the application does not have known reputation in..may receive the following warning: "Windows protected your PC: Windows Defender SmartScreen prevented an unrecognized app from starting.
Running this program might put your PC at risk". Open Control Panel and click on Action Center icon. Windows SmartScreen prevented an unrecognized app from starting.
If you have a PC problem, we probably covered it!
Is your SmartScreen Filter turned off?
Windows Defender Antivirus doesn't report them as malware. Running this app might put your PC at risk. Running this app might put your pc at risk" appears while downloading or installing.