Windows Security won't run

Question

I made a dumb mistake. I clicked on a suspicious link on YouTube and got hit. Warnings about numerous viruses pops up and Windows Security will no longer run. Can I fix this or am I doomed to start all over and reload my Operating System? The worst is I know better after working with and building computers for years. I very seldom get slammed like this. Anyone got some ideas?

Mike

Answer 1

Hi Mike,

Thank you for that information, please use these steps.

Click your Start Button, then just type Powershell and on the resulting list, right click PowerShell and select 'Run as Administrator'.

Paste this command into Powershell and press Enter:

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

When that completes, close PowerShell and restart (not shut down) your PC

If that does not solve the error popup, repeat the process, but this time, paste this command:

Add-AppxPackage -Register -DisableDevelopmentMode "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppXManifest.xml"

Answer 2

I have same problem as Mike T. When I try to access Windows Security, I get error message I need an app and I get pop up box to check Microsoft store. Click link and I get a message "no results found" .

I tried pasting the two links listed from DaveM121 into powershell screen and got error messages. First was app not installed. Second paste was "Add-app package : Cannot find path"

Any suggestions ?

Thank you

Tony Sun

Answer 3

The first command worked. Thank you so much.

Answer 4

There is no error on startup. The problem happens when I open Windows 11 Settings > Privacy & Security > Windows Security and try to open Windows Security. A pop-up window states 'You'll need a new app to open this windowsdefender link". My other computers just run the APP.

Mike

Answer 5

Hi Mike

I am Dave, I will help you with this.

Restart (not shut down) your PC, then please provide a screenshot of your PC showing where you see Defender will not run and any other error.