Windows Defender SmartScreen acts as a sort of guard dog while you use Windows 10. It will block you from opening some apps if they come from an unknown place or are created by an unknown publisher.

Edge currently uses Microsoft Defender SmartScreen to detect and block known scams. ... The scareware blocker is a tool that ...

On an iOS device, look for the Microsoft Defender SmartScreen option and toggle the button next to it to disable it. On Android devices, you need to follow one extra step.

Turn on "Microsoft Defender SmartScreen" toggle switch (if applicable). Once you complete the steps, the security feature will turn on, and you can continue browsing the web as always.

The SmartScreen filter in Windows 10 can sometimes stop you from downloading the app you want. Here's how to get past it, and why sometimes you should think twice before doing so.

In Windows Defender, you can also change Edge's SmartScreen to merely warn you when you are about to download a file it deems suspicious instead of it outright blocking it.

A Phemedrone information-stealing malware campaign exploits a Microsoft Defender SmartScreen vulnerability (CVE-2023-36025) to bypass Windows security prompts when opening URL files.

Double-click on Force Microsoft Defender SmartScreen checks on downloads from trusted sources setting. Choose the Enabled option to turn it on or Disabled options to turn it off. Click the OK button.