Best answer as chosen by user billebob12010: Avast Should Be fine
With Zone Alarm FW and Avast free, I think you will be fine. I would encourage MBAM (Malwarebytes-Antimalware) which is "on demand" protection but one of the best ways to remove malware and it's free. I would be comfortable with that set-up, and of course, always use common sense! Good luck!