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  1. Jan 23, 2024 · Learn how Windows 11 can keep your laptop secure with built-in antivirus and security features like Microsoft Defender and your Microsoft Edge browser. Microsoft Security features built into Windows 11.

  2. Jan 23, 2023 · Microsoft’s Windows Defender antivirus software now ships with all Windows 10 and Windows 11 laptops. But is it good enough?

    • Anthony Spadafora
  3. May 24, 2024 · Turning it on in Windows 11 is pretty straightforward and can be done in a few simple steps. All you need to do is navigate through the Settings app, access Windows Security, and toggle the switch for Windows Defender. Let’s dive into the step-by-step process to get it up and running. Turning on Windows Defender in Windows 11.

    • Overview
    • How to install update definitions on Defender Antivirus
    • How to scan for malware on Defender Antivirus
    • Quick Scan
    • Full Scan
    • Custom Scan
    • How to exclude scan locations on Defender Antivirus
    • How to perform offline malware scan on Defender Antivirus
    • How to view scan malware history on Defender Antivirus
    • How to allow threats on Defender Antivirus

    How-to

    If you're new to the Microsoft Defender Antivirus, use this guide to learn everything you need to manage the security feature to protect your computer.

    Jump to:

    •Update definition

    •Perform scans

    •Exclude scan paths

    To update the definition of the Microsoft Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Virus & threat protection updates" section, click the protections updates option.

    •Click the "Check for updates" button.

    Windows 11 automatically scans your computer for malware using the Microsoft Defender Antivirus. However, if you suspect the device may be infected, you can use the available options to perform a scan manually.

    A quick scan takes the least amount of time because it only scans the locations where malware is more likely to hide.

    To perform a quick scan with the Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Current threats" section, click the Scan options setting.

    A full scan takes the longest because, as the name implies, it scans all the locations on the hard drive.

    To perform a full scan with the Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Current threats" section, click the Scan options setting.

    A custom scan allows you to scan a particular section of the main drive or external storage. Usually, you would use this feature to check an external USB drive, flash drive, or a specific file you downloaded from the internet.

    To perform a custom scan with the Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Current threats" section, click the Scan options setting.

    If you want to prevent the antivirus from scanning a particular folder or file, you can add and remove scanning locations.

    To prevent the Microsoft Defender Antivirus from scanning specific locations, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Virus & threat protection settings" section, click the Manage settings option.

    On Windows 11, you may sometimes come across complex malware that the antivirus may not be able to remove while the system is running. In this case, you can perform an offline scan. When activating this feature, the computer will restart and go into the Windows Recovery Environment (WinRE) to perform a scan while the system is offline. 

    To perform an offline scan with the Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Current threats" section, click the Scan options setting.

    Whether you recently performed a virus scan or want to view recent protection actions, the Microsoft Defender Antivirus also includes a page where you can review the protection history and recommendations.

    To view the protection history of the Microsoft Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Current threats" section, click the Protection history option.

    Sometimes, the antivirus may detect an application or file as a threat when you know it comes from a trusted source. If this happens, the application includes an option to allow the threat.

    To allow a threat on the Defender Antivirus, use these steps:

    •Open Start.

    •Search for Windows Security and click the top result to open the app.

    •Click on Virus & threat protection.

    •Under the "Current threats" section, click the Allow threats option.

  4. Windows Security, formerly known as Windows Defender Security Center, is an app built into Windows 10 or 11 that helps keep your PC more secure. It includes Microsoft Defender Antivirus, an antivirus tool that helps protect you against viruses, ransomware, and other malware.

  5. Windows 10 and 11 include Windows Security, which provides the latest antivirus protection. Your device will be actively protected from the moment you start Windows. Windows Security continually scans for malware (mal icious soft ware), viruses, and security threats.

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  7. May 2, 2024 · Microsoft Defender Antivirus is available in Windows 10 and Windows 11, and in versions of Windows Server. Microsoft Defender Antivirus is a major component of your next-generation protection in Microsoft Defender for Endpoint.

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