You can find and reinstall Microsoft Defender directly from the Microsoft Store.
For advanced users, opening PowerShell as an administrator and running the following command will redeploy the security interface: Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage 2. Windows Security vs. Microsoft Defender App windows security download
If the app is missing or broken due to malware or system errors, you can reinstall or repair it using these official methods: You can find and reinstall Microsoft Defender directly
Windows Security is the built-in, comprehensive security suite that comes pre-installed on all modern Windows 10 and 11 devices. Unlike traditional third-party antivirus software, it is integrated directly into the operating system to provide real-time protection from the moment you start your PC. windows security download