Unblock Microsoft EDGE

If Microsoft Edge is being blocked by Microsoft Defender SmartScreen, use the matching path below:

1. If Edge is blocking a download
   • Open the Downloads page in Edge.
   • For a legitimate Microsoft file that was blocked, select Keep.
   • In a similar case with Microsoft diagcab files, the accepted guidance was to use Keep on the Downloads page in Edge.
2. If SmartScreen is blocking websites in Edge
   • In Edge, go to edge://settings/privacy.
   • Open Services.
   • Turn off Microsoft Defender SmartScreen.
   • This setting applies to all profiles in that Edge installation, including InPrivate and Guest mode, and is not synced across devices.
3. If the device is managed by policy
   • A local change might not be available. SmartScreen can be configured by admins using Group Policy, Microsoft Intune, or MDM.
   • In managed environments, the policy setting is reflected in edge://settings/privacy.
4. If Edge updates or install checks are being blocked by network filtering
   • Allow https://msedge.api.cdp.microsoft.com
   • Allow *.dl.delivery.mp.microsoft.com
   • These endpoints are used for Microsoft Edge update checks and downloads.
5. If the block is for potentially unwanted apps
   • In Edge, select Settings > Privacy, search, and services.
   • Under Security, turn on or off Block potentially unwanted apps as needed.

Turning off SmartScreen or PUA blocking reduces protection against phishing, malware, and unwanted app downloads. Re-enable it after testing if the block was a false positive.

References:

• Microsoft Edge support for Microsoft Defender SmartScreen
• Troubleshooting tips for downloading, installing, and updating Microsoft Edge
• Detect and block potentially unwanted applications
• HP Laptop Windows 10 blocks a Microsoft Diagcab WinSecurity.exe - Microsoft Q&A