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"Windows Smartscreen the Start of an unknown App has been prevented" - that you should take note of!

  • Nov 14, 2025
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Windows 10 sometimes shows the error message "Windows Smartscreen the Start of an unknown App has been prevented". This Problem can have different causes. You will need to change the SmartScreen settings, then possibly. In this practical tip we will show you how to do that.

Windows 10: SmartScreen off
In the next tip we will explain how you the Cortana language support under Windows 10 disable can.

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