SmartScreen Filter Blocking Download Windows 11 Fix [2026]

Quick Answer: SmartScreen blocks downloads it doesn't recognize. Click "Keep anyway" or disable SmartScreen in Windows Security > App & browser control > Reputation-based protection.

Symptoms

"This file might be dangerous" warning
Download blocked automatically
Can't install downloaded software
SmartScreen prevented an unrecognized app

Root Cause

SmartScreen flags files without reputation history or from unknown publishers.

Fix

Method 1: Keep Anyway

Download arrow → ... → Keep → Keep anyway

Method 2: Disable SmartScreen

Windows Security → App & browser control
Reputation-based protection settings
Turn off "Check apps and files"

Method 3: Group Policy

Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\System" -Name "EnableSmartScreen" -Value 0

Method 4: Add Exclusion

Windows Security → Virus & threat protection → Exclusions

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