Windows 10: You'll need a new app to open this windowsdefender

I keep getting stuff from Windows Defender and I want to open it but then I get the error in the title. I have Avast (free version) but I was getting the error before I installed Avast. How do I fix this? If you do need it here is my computer's specs


Dell Latitude E6530

Intel Core i5 vPro (3rd gen)

8gb RAM

320gb HDD

Windows 10 Pro 64-bit version 1809

:)

 

Mail app will not open on 10041.


Hello Adam,

This is the suggested solution below if you haven't already tried it.

In this Windows 10 build 10041, the Mail, Calendar, and People apps may be broken due to a licensing issue with the Store Beta. To get these apps working again, you need to follow these steps:

• Open powershell as administrator
• Run the command Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online
• Re-install Mail, People and Calendar from the Store (green tile)

 

new install Windows 10 1809 - You'll need a new app to open this windowsdefender

New computer - all clean, installed windows 10 pro v1809 - All works, but Anything I click on that pertains to windows security (in settings) - simply brings up a dialog box "You'll need a new app to open this windowsdefender" and does nothing else. Not
even sure windows defender is on with this error. Others since late Dec 2018 are reporting this as well - No solution yet. Please help. Tried all obvious stuff.

 

None of the new apps will open

Hi,

Welcome to Microsoft Community.

We apologize for the inconvenience caused to you. I would like to know the detail below to assist you better with the issue.

• Do you get any error message/code?

With regards to Start menu, I would suggest you to follow the steps:

• Open the Task manager. Here’s a tip: Press CTRL+Shift+ESC.
  
• Click File > Run New Task
• Make sure you have a check mark beside “Create this task with administrative privileges”
  
• Type CMD
• Type the following 4 commands at the CMD prompt:
  
  dism /online /cleanup-image /restorehealth
  
  sfc /scannow
  
  powershell
  
  Get-AppXPackage -AllUsers |Where-Object {$_.InstallLocation -like "*SystemApps*"} | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
  
• Close the CMD window

Check to see if the issue is resolved. If not, restart the PC.

If the issue persists, I suggest you to
create a new user account and check if you still face the issue. To create it perform the steps mentioned below.

• Press Windows key + R key, Run window opens.
• Type control in the open box and clickOk.
• Control Panel windows opens.
• Click on User accounts and Family Safety.
• Click on User Account and then click on
  Manage Accounts.
• Now click on Add a new user and follow the instructions.

Now check if the issue persists in the new user account.

Keep us posted on the issue to assist you better.