If the Windows Security app is missing from your Start menu or crashes when opened, you may need to repair the Windows installation files.
If you want to start using the built-in protection, follow these steps: download windows defender for windows 10
If it seems to be missing or is not working, you can restore or re-enable it using the following methods: 1. Enable Real-time Protection If the Windows Security app is missing from
If you previously installed a third-party antivirus (like AVG or Malwarebytes), Windows Defender automatically turns itself off to avoid conflicts. download windows defender for windows 10
You do not need to download (now called Windows Security ) for Windows 10 because it is built into the operating system and enabled by default .