[Hellboy]

Oh, 2 more things to do before giving up:

1) Turn off Windows firewall altogether (and no, I don't mean permanently - that would likely be a bad idea, unless you're quite confident you're protected through your router).

2) Reboot your computer (preferably a cold boot - i.e. by powering the computer all the way down). Never, ever give up on debugging a PC problem without going through a reboot! (or 2 or 3 reboots!)