Currently, I have the AVG Free Edition for my virus scan and Zone Alarm for my firewall. I have internet service thru Comcast. They are now offering a free McAfee Virus scan and a free McAfee Personal Firewall Plus. Would I be better off changing to this or keeping what I have.

Is this enough protection - or should I actually purchase something. Thank you.

I have a Dell Dimension 4100 with windows ME. I use Firefox, instead of internet explorer as my browser. I also have SpyBot and AdAware. Am I doing enough to protect my computer?