Accept you tried opening Windows Security only to get the "Y'all'll demand a new app to open this windowsdefender link" error bulletin? Well, don't panic, as this is a highly fixable effect.

But try the troubleshooting steps beneath, and you'll presently regain access to this of import security tool in Windows eleven.

1. Install the Latest Windows 11 Updates

Equally y'all start troubleshooting this trouble, you should beginning try restarting your Windows xi computer and see if you tin can launch Windows Security afterward. If non, perhaps updating the Os will get rid of the error.

To update Windows 11 manually, Right-click Start on the Taskbar. And then, navigate to Settings > Windows Update and click on Check for updates. If there'south a cumulative or security update bachelor, click Download now.

windows 11 update download window

Restart your Windows eleven PC, attempt opening Windows Security over again, and see if the updates made the error go abroad.

2. Repair or Reset the Windows Security App

If the updates didn't help, perhaps repairing or resetting the Windows Security App will practice the fox.

To repair Windows Security, press the Win fundamental + S to open Windows Search and type windows security in the search box. In the search results, under Best lucifer, right-click Windows Security and select App settings.

opening the app settings of windows security

Scroll down until you become to the Reset section and click on Repair. After Windows finishes repairing Windows Security, try opening it to encounter if the fault message is gone.

the reset section of the windows security app's settings

If the issue persists, you should try resetting the Windows Security app. Head back to the Reset department in Windows Security'southward App settings and click on the Reset button this fourth dimension around.

Resetting the Windows security app will besides delete its data, meaning you'll have to configure it all over again to return information technology to the state it was in before the reset.

Test to see if you can now open Windows Security normally.

3. Apply PowerShell to Register the Windows Security App

Withal can't open Windows Security? Endeavour registering it.

To do this, printing the Win cardinal + Southward and type powershell in the search box. In the Best match section of the search results, right-click Windows PowerShell and select Run as administrator.

running powershell as admin from windows search

Click Yes on the UAC prompt so copy and paste the below command into PowerShell:

Become-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage

Hitting Enter to run the control.

registering the windows security app through powershell

Later it'south done, open Windows Security over again and see if the error persists.

iv. Reset Windows 11

One of the methods mentioned in a higher place will likely become rid of the "You'll need a new app to open this windowsdefender link" mistake message. But in case yous're still seeing it after trying them, nosotros propose bankroll up your of import files and folders and resetting Windows xi.

Back to Using the Windows Security App

When the error message tells you to open up the Windows Defender link in another app, don't bother looking. There'due south no other app y'all tin use. This is a well-known trouble in the Windows 11 community, and y'all can set it with the steps outlined in this article.