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    Windows Guides
    Beginner
    1 min read 6 stepsApril 2, 2026Verified April 2026

    How to Use Windows Security (Windows Defender)

    Your PC has free built-in antivirus protection — here is how to use it.

    In this guide (6 steps):

    1. 1.Open Windows Security
    2. 2.Run a Quick Scan
    3. 3.Scan a specific file
    4. 4.Check real-time protection
    5. 5.Review Firewall settings
    6. 6.Check Device Security
    1

    Open Windows Security

    ~15s
    Search for "Windows Security" in the Start menu. This app protects your PC from viruses, malware, and threats — it comes free with Windows.
    2

    Run a Quick Scan

    ~15s
    Click Virus & Threat Protection, then Quick Scan. This checks your most common files for threats. It runs in the background while you work.
    3

    Scan a specific file

    ~15s
    Right-click any file or folder in File Explorer, then select "Scan with Microsoft Defender." On Windows 11, you may need to click "Show more options" first.
    4

    Check real-time protection

    ~15s
    Go to Virus & Threat Protection > Manage Settings. Make sure Real-time Protection is turned on. If you turn it off, it turns back on automatically for safety.
    5

    Review Firewall settings

    ~15s
    Click Firewall & Network Protection. The firewall monitors network traffic and blocks suspicious connections. Keep it turned on for all network types.
    6

    Check Device Security

    ~15s
    Click Device Security to see hardware protection features. Windows Security also includes Account Protection, App & Browser Control, and Family Options.

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    Official Resources

    Microsoft SupportHow-To Geek — WindowsGCFGlobal — Windows Basics

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    How to Use Windows Security (Windows Defender) — Step-by-Step Guide | TekSure