How to fix “You’ll need a new app to open this windowsdefender” error in Windows?

Question

Issue: How to fix “You’ll need a new app to open this windowsdefender” error in Windows?

Hello. When I try opening the Windows Defender app I receive this message – “You'll need a new app to open this windowsdefender.” How can I fix this?

Solved Answer

Windows Defender is an important part of the operating system. It protects users against Trojans, ransomware, and other types of malware[1] infections. Windows users can feel safer with this built-in application when it comes to cybersecurity threats. Besides the virus detection, it has a lot of other functions, like:

  • Real-time threat detection
  • Firewall & network protection
  • Protection against phishing sites
  • System performance reports
  • Hardware security
  • Parental controls

Windows Defender covers a lot of aspects from Internet safety to hardware. Parents can also use it to limit their children's activities while they are using the machine. It is considered to be a fairly good option for everyday users that want to protect their privacy and security. Nowadays, cyber threats are constantly on the rise, and it is great that Windows users can ensure their device's security for free.

However, some people have been experiencing issues with the app. More specifically, certain users receive a message “You'll need a new app to open this windowsdefender” when they try to open the security app. This has left many people feeling uneasy and unprotected. It is unknown what exactly causes this prompt to show up but users found that executing certain Powershell commands has helped.

You can also use a repair tool like ReimageMac Washing Machine X9 that can fix various system errors, BSoDs,[2] corrupted files, and registry[3] issues. This powerful software helps to maintain a healthy system and keep it running smoothly. Otherwise, if you are ready to begin the guide that could help you fix the “You'll need a new app to open this windowsdefender” error, follow the steps below very carefully.

How to fix "You'll need a new app to open this windowsdefender" error in Windows?

Method 1. Run a Powershell Command

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • Open and Run Windows PowerShell as Administrator
  • Copy and paste the command below and press Enter

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

Run a Powershell Command

  • Restart your computer and check if the issue persists
  • If that did not work, open PowerShell as Administrator again and run this command:

Windows 11: Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\\AppXManifest.xml”}

Windows 10: Add-AppxPackage -Register -DisableDevelopmentMode “C:\\Windows\\SystemApps\\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\\AppXManifest.xml”

  • Restart your PC

Method 2. Reset Windows

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • Go to Settings, and choose System
  • Go to the Recovery tab and click Reset PC
  • Follow the on-screen instructions to finish the process

Reset Windows

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A VPN is crucial when it comes to user privacy. Online trackers such as cookies can not only be used by social media platforms and other websites but also your Internet Service Provider and the government. Even if you apply the most secure settings via your web browser, you can still be tracked via apps that are connected to the internet. Besides, privacy-focused browsers like Tor is are not an optimal choice due to diminished connection speeds. The best solution for your ultimate privacy is Private Internet Access – be anonymous and secure online.

 

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About the author
Ugnius Kiguolis
Ugnius Kiguolis - The problem solver

Ugnius Kiguolis is the founder and editor-in-chief of UGetFix. He is a professional security specialist and malware analyst who has been working in IT industry for over 20 years.

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