Don't have Windows 11 Defender installed? This is the way to solve it

Windows 11 Defender not installed is one of the many problems that users face when trying to use Microsoft’s default antivirus software on their PC.

In the past, users have complained about Windows 11 Defender being turned off. But some people can't even find the app on their PC at all.

Thankfully, the fix for this problem isn't far-fetched and in most cases only requires a few tweaks here and there.

In this tutorial, you'll learn four practical ways to fix the problem and get your PC back to normal. Even better, you can save yourself all the hassle and mistakes with a better alternative from ESET Antivirus.

What does Windows Defender do on Windows 11?

Starting with Windows Vista, Windows Defender has been the default Windows antivirus software.

It has made some significant and encouraging improvements over the years. It has gone from offering only limited protection to one of the best free antivirus software available.

Unlike earlier versions of Windows Defender, the latest version on Windows 11 offers complete malware and ransomware protection.

This is not just a feature offered by some paid antivirus software. It’s safe to say that Windows Defender software protects your PC from viruses in real-time.

How does Windows Security differ from Windows Defender?

Microsoft’s default antivirus and security app on PC was originally Microsoft Security Essentials.

In Windows 7 and later versions of Windows 10, the name changes to Windows Defender.

The name has been retained in Windows 11, but with some improved functionality. So, Windows Defender and Windows Security are the same, just the names have evolved over time.

Methods to resolve Windows 11 Defender not installed

1. Use PowerShell to install

1. Right-click the Start icon in the taskbar.
2. Select the Windows 11 Terminal (Admin) option to open PowerShell.
3. Click the Yes button to allow PowerShell to make changes to your PC.
4. Type the following command: <strong>Set-ExecutionPolicy Unrestricted</strong>
##Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}<strong>.</strong>

Now, press
5. Enter key and let the command run.

The above command helps to reinstall all default Windows applications. This is especially useful if Windows 11 Defender is not installed due to file corruption during the upgrade.

2. Repair and reinstall

Right-click the
1. Start icon on the taskbar and select Windows Terminal (Admin)options.
Type the command:
2. Get-AppxPackage Microsoft.SecHealthUI-AllUsers | Reset-AppxPackage<strong></strong>
Now, press
3. Enter key and allow the command to run.

Sometimes, Windows 11 Defender may be installed but installed incorrectly or incompletely.

Expert Tip: Some PC problems are difficult to solve, especially if the repository is corrupted or Windows files are missing. If you are having trouble fixing errors, your system may be partially corrupted. We recommend installing Restoro, a tool that can scan your machine and determine where the fault lies. Click here to download and start repairing.

The above command will remove all Windows security components on your PC. After this, it will help you reinstall the compatible version.

3. Perform Windows Update

Press the
1. Start button.
Click
2. Settings Application.
Select the
3. Windows Update option in the left pane.
Click the
4. Check for Updates button in the right pane.

Windows updates come with fixes for bugs and other bugs from previous versions.

If Windows 11 Defender is not installed on your current version of the operating system, the update should fix the bug that may be causing it. Also, if it's due to an incomplete or incorrect update, doing it correctly should fix the problem.

4. Perform System Restore

1. Click the Windows icon and type System Restore.
2. Select the Create Restore Point option.
3. Click the System Restore button.
4. Select "Next" in the "System Restore" window to continue.
5. Select a restore point from the options provided.
6. Now, click on the Next button and follow the on-screen instructions to complete the recovery.

If you find that Windows 11 Defender is missing after installing an update, this fix can help you restore normal service. Just choose a later restore point before installing new updates and everything will be back to normal.

Is Windows Defender enough for my PC needs?

As mentioned before, Windows Defender has come a long way since it was first released with Windows Vista.

It becomes very effective in detecting and eliminating malware and ransomware. It ups the ante with sandboxing and cloud-based malware detection and network-based blocking.

Additionally, it flags phishing websites as one of the impressive features of this new Defender on Windows 11.

However, Microsoft is not a cybersecurity company, and there is room for improvement. Dedicated PC and data protection software offers more complete functionality than Defender.

They provide complete PC security against even the most stubborn malware and online data security. They also offer advanced data security such as data encryption, among other amazing features.

What’s impressive is that it doesn’t have to be one or the other, as most can work on the same PC using Windows Defender.

Windows 11 Defender not installed issue is not the first problem that users face. Some people have complained about issues such as Windows 11 Defender not turning on or not enabled.

Unlike some of these problems, this one is not difficult to solve, as we showed above. We hope you found this tutorial useful and get Windows Defender back to protect your PC.

The above is the detailed content of Don't have Windows 11 Defender installed? This is the way to solve it. For more information, please follow other related articles on the PHP Chinese website!