No Firewall!

After i installed the Bitdefender Internet Security 2008, the firewall wouldn't start. Even i manually click "FIX", it still cannot work, my firewall just won't start, leaving three issues there and cannot be fixed.


What should I do so that i can enjoy the full fuction of Internet Security 2008?? :wacko:


By the way, after installing the antivirus on my Vista Ultimate, the boot up seems start slow, the memory usage also goes up and high.


Someone plz help me and thanks .