I can't open my windows defender after downloading from ocean of games, this to me back.

[xaviel]

i cant open my windows defender after downloading from ocean of games, this doesnt happen to me back then. i tried many youtube videos to troubleshoot it like a lot. and it still wont open (windows defender).  

[erico]

You probably downloaded a game  that came with free malware or a virus.

You might have to reinstall Windows.

[xaviel_1]

i cant reset my laptop, therefore my only option would go to the store again and make them reinstall my windows agaiiinnn ??? is there any other way?

[erico]

Which version and build of Windows is installed?

Can you access Powershell?

See this thread at Microsoft Community forums.
https://techcommunity.microsoft.com/t5/windows-insider-program/issue-with-windows-defender-on-window...
Type the word Powershell into the search box at the bottom of your screen. Right-click on the Powershell app and choose Run as Administrator
.

"Step 1. While logged into Windows as my regular user, I started PowerShell 7 (x64) in Administrator code and ran these two commands:
Set-ExecutionPolicy Unrestricted
Get-AppxPackage Microsoft.SecHealthUI -AllUsers

The second command showed a bunch of information, including the InstallLocation.

"Step 2. Start PowerShell 7 (x64) in standard user mode. I entered a command like this, where InstallLocation was the value from Step 1, above:
add-appxpackage -disabledevelopmentmode -register ('InstallLocation\AppxManifest.xml')

This was the exact text of my command; yours may vary:
add-appxpackage -disabledevelopmentmode -register ('C:\Program Files\WindowsApps\Microsoft.SecHealthUI_1000.22000.1.0_neutral__8wekyb3d8bbwe\AppxManifest.xml')
"

Do you have an administrative login or just an ordinary user login?