malwarebytes I've used for a long time now.....Microsoft security essentials I've got on the netbook.
Because my laptop is my "main" computer, I chose to go the Norton route, figuring paying more means better security.
Apparently, not.
I'm always careful about where I go, what I download, etc.
So maybe I can forgo the expense, and stay with the MSE program...
One thing I do know for sure. Any program Kovid says is safe, is safe.