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.
Microsoft ended support for its older OS on Oct. 14, but there are three ways to extend critical security updates and remain on Windows 10 for another year. Two options are free.
Microsoft ends support for Windows 10. After that, systems running Windows 10 will no longer receive security patches, bug fixes, or official support.  ...