Featured - How to update Windows Defender Automatically and Manually

Microsoft Defender, previously known as “Windows Defender,” is a built-in utility on Windows 10 and Windows 11 that aims to protect your PCs from attacks and viruses.  Because new malware or threats are developing on your PC, you must keep your Windows Defender antimalware Definition up to date to provide numerous effective antimalware to protect your PC on Windows 11.

Note: In 2020, Microsoft changed the name of the security feature on Windows 10 to “Microsoft Defender”. Read more here.

How Microsoft Defender Definitions Updates Work

Microsoft regularly updates security intelligence in antimalware products to cover the most recent threats. It improves detection logic, improving the capacity of Microsoft Defender Antivirus and other Microsoft antimalware solutions to identify threats effectively. This security intelligence collaborates directly with cloud-based protection to give AI-enhanced, next-generation protection that is quick and powerful.

If you have Microsoft Defender switched on, it will update most of the time automatically. However, in rare situations, Microsoft Defender does not update itself for an extended time, leaving your machine vulnerable to unwanted attacks. With the requirement for many individuals to update Windows Defender, there are often two options: automatically and manually updating Microsoft Defender for Windows 10 and 11.

⚠️ Please note: The process described below is the same in Windows 11 as it is in Windows 10. However, bear in mind that we’ll be using screenshots from Windows 11, so your UI may look a little different. We’ll point out any changes you need to be aware of as they come up.

How To Update Microsoft Defender Via Windows Security

If you are used to making things flawless, select the option of automatically upgrading Microsoft Defender. As a result, Microsoft Defender Antimalware and antivirus may always acquire the most up-to-date definitions on Windows 11.

  1. Click on the “Windows” icon, type in “Windows Security,” and select “Windows Security” from the result


    Windows 11 - Open Windows Security

  2. Under “Virus & threat protection updates,” click on “Protection Updates”


    Windows 11 - Windows Security - Virus & Threat Protection - Virus & Threat Updates - Protection Updates

  3. Click on “Check for Updates” to update the Windows Defender


    Windows 11 - Windows Security - Virus & Threat Protection - Virus & Threat Updates - Protection Updates - Result

How To Update Microsoft Defender Via Command Prompt

You can use the command prompt to update the Microsoft Defender in Windows 11. Follow along.

  1. Click on the “Windows” icon, type in “Command Prompt,” and select “Command Prompt” from the result


    Windows 11 - Open Elevated Command Prompt

  2. Enter the following command in the command prompt


    "%ProgramFiles%Windows DefenderMpCmdRun.exe" -removedefinitions -dynamicsignatures

     

    After running this command, you can see all the version definitions of the Windows Defender.Windows 11 - Elevated Command Prompt - Enter Cmd to Clear Cache

  3. To update, run the following command in the command prompt


    "%ProgramFiles%Windows DefenderMpCmdRun.exe" -SignatureUpdate

    Windows 11 - Elevated Command Prompt - Enter Cmd to Update Microsoft Defender Antivirus definition

How To Update Microsoft Defender Via Task Scheduler

Method description

  1. Click on the “Windows” icon, type in “Task Scheduler,” and select “Task Scheduler” from the result


    Windows 11 - Open Task Scheduler

  2. In the “Task Scheduler,” right-click on the “Task Scheduler Library” and select “New Folder” from the context menu


    Windows 11 - Task Scheduler - Task Library - New Folder

  3. Type in “Antivirus,” and click “OK”


    Windows 11 - Task Scheduler - Task Library - New Folder - Name - Accept

  4. Right-click on the newly created folder “Antivirus,” and select “Create Task…” from the context menu


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task

  5. In the “Create Task” dialogue box, under the “General” tab, check the radio button “Run whether user is logged on or not”


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - General - Click Run User Logg On o Off

  6. Under the “Triggers” tab, click on the “New…” button


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Triggers - New

  7. Fill in all the details, select “On a schedule,” select the starting time, and select “Daily” from the side options


     Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Triggers - New Trigger - On a Schedule - Daily - 8pm - Accept

  8. Under the “Action” tab, click on the “New…” button


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Actions - New

  9. In the “New Action” dialogue box, select “Start a program” from the action list, type in the following command in the “Program/script,” and then click “OK”


    "%ProgramFiles%Windows DefenderMpCmdRun.exe" -removedefinitions

    Add the following argument as shown in the picture:

    -dynamicsignatures

    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Actions - New Action - Start a Program - Tipe Program Script - Type Add Arguments - Accept

  10. Under the “Actions” tab, click on the “New…” button


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Actions - New

  11. In the “New Action” dialogue box, select “Start a program” from the action list, type in the following command in the “Program/script,” and then click “OK”


    "%ProgramFiles%Windows DefenderMpCmdRun.exe"

    Add the next argument as shown in the picture:

    -SignatureUpdate

    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Actions - New Actions - Start a Program - Type Program Script - Type Add Arguments - Accept

  12. Under the “Settings” tab, check all the checkboxes as shown in the image, fill in the detail as required, and then click “OK”


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus - Create Task - Settings - Check Allow Task - Check Run Task Asap - Check If Fails Restart Every

  13. Type in your username and password, and click “OK”


    Windows 11 - Task Scheduler - Task Library - New Folder - Antivirus User Name - Password - Accept

How to Run Windows Defender from the Command Line (CMD)

Knowing how to run Windows Defender from the command line can be very useful. Perhaps you’ve been locked out of its UI due to malware, are trying to run a scan from recovery media, or are using a GUI-less Windows Server install. In any of these situations, knowing a scan command or two can save you a lot of trouble.

Windows Defender Application Guard: How to Turn It On or Off

Windows Defender Application Guard and its enforcer, Windows Defender Application Control, are tools to keep employees productive and prevent attacks. Under the system, administrators can prevent regular access to anything other than manually selected work-related sites. In our other tutorial we show you how to turn Windows Defender Application Guard on or off.

Turn On or Off Windows Defender Application Guard in Windows 10

How to Turn on the Hidden Adware Blocker in Windows Defender

Windows is great at preventing trojans, ransomware, and other serious issues, but it can fail to stop adware and potentially unwanted programs in its default configuration. Thankfully, the Windows Defender has an adware blocker just for this, and it’s great at stopping unwanted changes to your system or annoying pop-ups.

Windows 10 - How to Activate Antimalware