Windows SmartScreen prevented an unrecognized app
This error matches known, documented patterns with reliable solutions.
Quick Fix (Most Common Solution)
- Click More info then Run anyway
- Verify app source is trustworthy
Seeing "Windows SmartScreen prevented an unrecognized app"? This error can be frustrating, but it's usually fixable. It typically affects your development workflow or system. Below you'll find clear, step-by-step solutions to resolve this issue.
What This Error Means
Windows does not recognize this application publisher.
Commonly reported in Chrome, Edge, and Firefox.
Not affiliated with browser, OS, or device manufacturers.
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Common Causes
- App from unknown publisher
- New or uncommon software
- Potentially malicious
How to Fix
- Click More info then Run anyway
- Verify app source is trustworthy
- Scan with antivirus first
Last reviewed: March 2026 How we review solutions
Optional follow-up
Some users ask whether saving fixes for recurring errors would be useful when the same issue appears again.
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Frequently Asked Questions
Is SmartScreen reliable?
It catches many threats but can block legitimate software.
Should I disable SmartScreen?
No - it provides important protection.
Also Known As
- Windows error
- Windows system error
- Windows PC error
- Microsoft Windows error
Common Search Variations
- "windows blue screen fix"
- "windows error code meaning"
- "windows 10 error solution"
- "windows update failed"
- "fix windows system error"
- "windows crash how to fix"
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