I use Win 7, and MS Security Essentials as one of my two anti-malware systems (Malwarebytes being the other). Support for Win7 is ending early next year, and people are being encouraged to switch to Win10, which has anti-malware built in (some adaptation of Win Defender, AIUI). Having had the misfortune to encounter Win 10 in the recent past, and floundered with it, I have no intention of abandoning Win 7 if I can possibly help it).
But does it mean that MS Security Essentials will not be updated either, to keep abreast of fresh malware?