Windows 7: Is it really necessary to switch on windows firewall ?

I have PC tools firewall plus installed on my system. Is it really necessary to switch on windows own firewall along with that? Because it has switched off windows firewall. I am asking this question because somewhere in this forum I read that we should switch windows firewall as well. It is difficult to go to windows firewall and switch it on every time I open my computer.

Thanks in advance.

I wouldnt use two firewalls .. like using two anti virus programs, it can have unwanted results. If you are going to use Windows default firewall, I suggest that you download Windows Firewall Controls .. It makes using Windows firewall much easier... otherwise, simply turn it off and use the firewall of your choice...

Thanks mate! I installed windows firewall controls. Its nice but I don't actually know how to make program access. It is asking allow all, block all for all programs like opera, ff and utorrent etc. What should I allow and what to block?