Fix Windows SmartScreen Blocking App Installation

Last updated: March 15, 2026

Fix Windows SmartScreen "protected your PC" warnings blocking app installations. Learn to safely bypass SmartScreen and test apps in Windows Sandbox.

Overview

Getting blocked by "Windows protected your PC"? This guide shows 6 methods to safely install apps that SmartScreen incorrectly blocks.

What this helps with

What to expect: Easy difficulty • usually about 10-15 minutes.

This is one of 67 Software Issues fixes in the WindowsHelper library. The full step-by-step fix lives in the WindowsHelper app.

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