MicrosoftSecurityApp.exe – Bad Image Error 0xc0e90002 on Windows

No, running that PowerShell command just reinstalls the Windows Security app itself. It won’t delete your Defender settings or anything in quarantine. All your protection settings and history stay the same. It’s safe to use.

If you’re seeing the “MicrosoftSecurityApp.exe – Bad Image” error with code 0xc0e90002 on Windows 11, there are a few things you can try. First, open PowerShell as an administrator and run the command Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage to reinstall the Windows Security app. Then, check for any available Windows updates by going to Settings > Windows Update and installing all updates.
If the problem started recently, try uninstalling recent updates from Settings > Windows Update > Update history > Uninstall updates. You can also run a Microsoft Defender Offline scan from Windows Security > Virus & threat protection to check for malware. Lastly, create a new user account to see if the issue is specific to your current profile.