Should I switch Anti-Virus programs?

I have Norton Internet Security 2009 that came installed on this new machine (which has Windows 7, if that’s necessary info or not). It has given me a 60 day trial. Although, I have Malwarebytes free installed on this machine as well. I had Avira Antivir on my old PC, which worked great. I’m still [...] http://bit.ly/qWzGI2