Quickly Solved | Windows Defender Not Working

Quick Navigation:

1. 1. Why Windows Defender Not Working on Your PC
2. 2. How to Get Windows Defender Work Again(7 Effective Solutions!)
3. 3. Dual Protection: Keep Your Data Intact Even Viruses and Other Threats

Is Windows Defender not working on your computer? Follow along as we figure out what's stopping it.

Windows Defender is anantivirus programthat's integrated into our Windows operating systems. This Defender by Microsoft has become one of the leading and best antiviruses today. It's quick, efficient, and doesn't require a separate purchase.

然而,问题是,有时候可能停止working. Many users have complained over the years that this tool can stop working. The problem isn't with the tool itself, but rather some computers, operating systems, and missing files.

So, let's find out what you can do to fix it if your windows defender isn't working.

Why Windows Defender Not Working on Your PC

Windows Defender is not working has many reasons. The plain and simple reason behind that could be to turn off real-time protection.

However, this is something that is seldom a problem. A few other, more likely and common reasons behind this could be:

• An outdated Windows or Antivirus database
• Windows services disabled or not working
• Third-party tools or antivirus programs preventing Windows Defender
• A tool or software installation that might havedisabled Windows Defender
• Corrupted system file or failed Windows Update
• Restart, Shutdown, or power failure during Windows or database update

These are some of the most common reasons that cause the Windows Defender to stop working. That's why you must check for these before you get started with the rest of the tutorial.

How to Get Windows Defender Work Again

Suppose you're continuously suffering from Windows Defender not working on your computer, then you can try a few things to make it work again. As mentioned before, there could be a few reasons behind it not working.

If you have tried resetting Defender, but nothing has worked so far, you can try these seven fixes we've compiled. So, let's examine what they are.

1. Fix 1. Uninstall Third-Party Antivirus
2. Fix 2. Reset Windows Security
3. Fix 3. Modify Local Group Policy Editor
4. Fix 4. Modify the Registry
5. Fix 5. Run a System Scan & DISM Repair
6. Fix 6. Update the Operating System
7. Fix 7. Try a Clean Boot

Fix 1. Uninstall Third-Party Antivirus

The first step you need to take is to remove any third-party antivirus software. With the prowess of Windows Defender, you don't even need another program. So, here's what you need to do:

Step 1.Click on theStartbutton or press theWindowsbutton on your keyboard > Click on theSettingscogwheel.

Step 2.Head intoApps

Step 3.TapApps & Featuresfrom the sidebar > Scroll down and find an antivirus program to uninstall it

Step 4.ClickUninstallto remove the third-party antivirus software

This will ensure no other program meddles with Windows Defender and is most likely to get it running again.

Fix 2. Reset Windows Security

If you have never had an antivirus, yet your Windows Defender isn't working, you can fix it by resetting the Windows Security app. Here's how to do it:

Step 1.Press theWindowsbutton on your keyboard > Browse the app menu inStart Menu.

Step 2.Scroll down until you findWindows Security> Click onMore> Then click onApp Settings

Step 3.Scroll down until you find the Reset option, then click on it

This will remove any errors and underlying problems and help you rerun Windows Defender.

Fix 3. Modify Local Group Policy Editor

You need to ensure your Group Policy's settings are intact. Sometimes, updates modify this setting, causing Windows Defender to stop working. Here's how to fix that:

Step 1.PressWindows+Ron your keyboard > Type “gpedit.msc” in run command.

Step 2.Click onComputer Configuration> Head toAdministrative Templates> TapWindows Components.

Step 3.Scroll down until you findWindows Defender Antivirus.

Step 4.EnterWindows Defender Antivirus> Scroll and findTurn off Windows Defender Antivirus & click it.

Step 5.Pick Disabled in the configuration section > Click Apply, then Okay.

And, done. This will ensure your Windows Defender isn't being prevented by Group Policy Editor and cause it to run again.

Fix 4. Modify the Registry

If your Windows Defender is still not working, then you can try to enable it through Windows Registry. Here's how to do that:

Step 1.PressWindows+Rand typeRegedit.

Step 2.Navigate toHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender.

You can simply copy and paste the above-mentioned address into the top search bar.

Step 3.Find DWORD value calledDisableAntivirus> Double click and set the value to0.

Step 4.Restart the computer for changes to take effect

This will most likely ensure your Windows Defender runs again.

Fix 5. Run a System Scan & DISM Repair

Windows 10 Deployment Image Servicing and Management or DISM is an in-built scanning and repairing command. This allows the operating system to scan and download necessary files to fix any errors within windows. Here's how you can use it to fix Windows Defender:

Step 1.PressWindows+Rand typeCMD,thenOpen As Administrator.

Step 2.In CMD type “DISM /Online /Cleanup-Image /CheckHealth”> Let the scan run.

This will find any errors or problems with Windows Defender, then download and fix the files. Since our computer didn't have any, it said, "No component store corruption detected." Therefore, you might find it a bit different.

Fix 6. Update the Operating System

If your Windows isn't up-to-date, it might be causing Windows Defender not to work. Here's how you can ensure your system is up-to-date. Here's how you can do it:

Step 1.Head toSystem Settings> Navigate toUpdate & Security> Click onCheck for updates.

Step 2.Let the update run and wait for it to prompt for a restart

This will also update your antivirus database and cause it to work again.

Fix 7. Try a Clean Boot

干净启动意味着没有其他程序干预Windows default software. You can tend it by using your Task Manager or System Configuration. Here's how to do both:

Step 1.Right-click on the taskbar and runTask Manager> Click on theStartuptab.

Step 2.Disable all the unnecessary applications exceptWindows Defender.

But, before you restart, you need to figure out System Configuration as well. Here's how:

Step 1.PressWindows+R& typemsconfigin the run command > Head to theServicestab.

Step 2.CheckHide all Microsoft services >ClickDisable all> ClickApply,thenOK.

Step 3.Restart your computer

This will ensure only Windows Defender starts up after you boot up Windows.

Dual Protection: Keep Your Data Intact Even Viruses and Other Threats

Once your Windows Defender starts running again, you never have to worry about losing your data again. While Windows Defender protects your computer from malicious content, you can always back up your important data from viruses and other threats. Therefore, you need the assistance of a third-party tool, and nothing is better at backing up your important data thanEaseUS Todo Backup. Among all the backup creators, this tool stands out as the most efficient one.

But how exactly will it protect your data from malicious content? It has a unique feature called the EaseUS security zone. This allows you to keep your files secure from any malicious threats from the outside. While Windows Defender secures your computer, EaseUS Todo Backup ensures the security of your important data. Because the security zone that this program creates goes unnoticed or unrecognized by viruses.

Therefore, even if your computer is attacked by viruses, your data will remain unaffected. And you can follow the steps below to learn how to use EaseUS Todo Backup:

Step 1. Select Backup Contents

On the main window, click the big question mark button to select backup contents. You can choose to back up individual files, entire disk or partition, operating system and mails.

Step 2. Select Security Zone as Backup Destination

While selecting backup destination, you can see the Security Zone option. ClickSecurity Zoneand use it as a backup destination.

However, if you're first to use the Security Zone function, EaseUS Todo Backup will guide you to create one. Click "Create Security Zone".

Choose a partition with enough free space for your backups and then click "Continue".

You can adjust the partition size for the security zone. Click "Create" to get it done.

Step 3. Execute the backup task

Click "Backup Now" to start the backup process. Your backups of OS, files, drives and mails in the security zone will be fully protected from being seen or destroyed by virus, ransomeware and trojan.

Conclusion

This is how you can ensure your computer's security by making Windows Defender work again. Furthermore, you can employ EaseUS Todo Backup to secure your files if Windows Defender ever stops working.