Thanks I'll certainly try bit av with comodo firewall, now I am stopped at Norton internet security, should I change to Bit av + Comodo firewall? Because Norton is really good itself.
That will be a well combination, in my opinion.
By the way, Comodo firewall seems to have closed its HIPS module to avoid continious notify (of course, the sandbox module will still on to protect you). It all depend on you.
And Bit av for free may not provide enough configuration.So I never use it.
As for Norton,I think it too silent but enough powerful. What may not satisfied me is that its cloud reputation may kil some files I need...