I prefer avast, though I'm not happy that their newest installer installs chrome without asking, grrrr!!!! Don't get me wrong. I like chrome, but I don't like programs installing without my permission.
MSE has let too many viruses through on our work computers lately. I like to use malwarebytes in conjunction with avast also.
Edit:
Avast has fixed their installer so you can opt out of chrome.
Other than a slight delay at startup, I don't notice any issues. Avast also has a game mode and full screen mode to prevent pops from appearing when your'e gaming or runnning an application in full screen mode.
U can use avast free antivirus . i also registered it free with automatic online update.detect virus and also repairs or deletes it.
MSE has let too many viruses through on our work computers lately. I like to use malwarebytes in conjunction with avast also.
download at -
Avast! -- Free Antivirus