An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Are you referring to Windows Defender? If you using Windows 10 Home, you will get support updates until October 2025 in reference to this article https://docs.microsoft.com/en-us/lifecycle/prod...
In case you reached the end of support for your Windows 10 Home, you will need to get Windows 11 as long as your computer's hardware meets the requirement to install Windows 11. You may ask your local PC technician for possible options like upgrading your PC components to match the criteria of the Windows 11 operating system.
For your reference about Windows 11 minimum system requirements, kindly visit https://support.microsoft.com/en-us/windows/win...
I hope this can help.