Several of us use Microsoft Security Essentials. It's free.

I supplement that by running the free Malwarebytes.

Many here also like AVG or AVAST. One of those - I forget which; have tried both - made some sort of switch that caused me to look elsewhere, and I found Microsoft Security Essentials. It runs with no effects.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.