Formerly known as Windows Defender, Microsoft Defender is an antivirus protection program that's included with Windows 10.
Windows 10 has reached end of life, but you can continue using it by enrolling your PC into the ESU program for free.
Windows 10 support ended on Tuesday, October 14. That means Windows 10 PCs will no longer receive security updates ...
If you’re thinking about moving forward, Microsoft recommends checking if your PC can run Windows 11. You can do this through the PC Health Check app or by going to Settings > Windows Update.
Microsoft ends support for Windows 10. After that, systems running Windows 10 will no longer receive security patches, bug fixes, or official support.  ...