Delete traces of Windows 7 Firewall

Hey all!
I’ve got a problem concerning my internet connection. Some https pages don’t work with FF but with IE. It appeared for the first time after having changed my ISP, but without having changed anything on my PC. So I supposed that somehow FFs acces to secured pages is blocked. I also had porblems connecting with some other programs, like msn live messnger, poker, or VoiP phone program… So I desactivated Windows Firewall but no effect! When I was looking for a solution via google, I found that even if the firewall is deactivated, the settings and rules are kept…so that’s my question: how to delete the rules Windows firewall once made? I’m running Win7, 64-bit.
Thanks!

May be delete the rules when Windows firewall is running?