OP
alarm man
i use norton 360,it does slow the system down but mainly on start up while it updates etc,then its fine,never tried the free stuff but any virus that been blocked by norton has come from emails from mates using free antivirus software,id keep away from mcafee twice ive lost everything on my machine due to a virus even with updates,used norton now for 3 years not a pick of trouble,and the net minder for the kids pc is great emails you when the try a site or word you have blocked