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How to View Detailed Windows Security Alert History in Windows 11

Olivia Miller Oct 12, 2026 869 views

Question details

The user wants to find detailed information about recent Windows Security alerts to determine the specific source of threats or unwanted applications.

How to View Detailed Windows Security Alert History in Windows 11

Product: Windows Security
Device & OS: Windows 11
Scenario: Investigating vague Windows security notifications to determine if a detected threat originated from a specific file, website, or email.
Observed behavior: Windows 11 security notifications report potentially unwanted apps or removed threats but do not directly explain the exact source in the initial popup alert.

Before you start

Ensure you are logged into an account with administrator privileges, as accessing detailed security logs in Event Viewer requires elevated permissions.

Solution 1Recommended

Check Protection History in Windows Security

This is the most straightforward method to review recent threats, blocked actions, and responses taken directly by Windows Defender.

The built-in Protection History interface provides a user-friendly log of recent detections, including the threat name, type, origin source, and the action taken by the system.

Open Windows Security

Click the Start menu, type 'Windows Security' into the search bar, and press Enter to launch the app.

Navigate to Threat Protection

In the left-hand menu, select 'Virus & threat protection' to open the primary security dashboard.

Access Protection History

Under the 'Current threats' section, click on the 'Protection history' link.

Review Detailed Alerts

Click on any listed detection to expand it. You may need to click 'Yes' on the User Account Control (UAC) prompt. Here you can review the threat name, affected items (source), and the action taken.

Check Protection History in Windows Security

Identify Threat Sources: The 'Affected items' path in the expanded details usually reveals whether the threat came from a downloaded file, a specific software directory, or an email attachment folder.

Solution 2

Inspect Security Events via Event Viewer

Use this advanced method to perform a deep-dive technical investigation of security logs when standard Protection History does not provide enough context.

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Frequently Asked Questions

Why is my Windows Security Protection History completely empty?

Your Protection History may be empty if no threats have been detected recently, or if the history log was automatically cleared. Windows Security typically clears these logs after 15 to 30 days.

Can I manually clear my Windows Security alert history?

Yes, you can clear it by deleting the files inside the 'Service' folder located at C:\ProgramData\Microsoft\Windows Defender\Scans\History\Service. You will need administrator permissions to access and modify this folder.

What is considered a 'Potentially Unwanted App' (PUA) in Windows 11?

A Potentially Unwanted App (PUA) is software that is not inherently a virus, but may cause your PC to run slowly, display unexpected ads, or install secondary software you did not explicitly request.

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