If you want an AV, MSE has the lowest attack surface impact. It has always been good at implementing security mitigation techniques (whereas other vendors are a

If you want an AV, MSE has the lowest attack surface impact. It has always been good at implementing security mitigation techniques (whereas other vendors are atrocious here) and it's not very invasive. For security as a whole, I would suggest a good adblocker, keeping your system up to date, keeping your browser and plugins up to date, and I'd suggest Chrome although maybe that's controversial.