Builtin Vista firewall and Windows Defender.
Also today Avast decided that I wasn't allowed to surf any pages in neither Firefox or IE, I had to kill Avast completely...
4.8 has been a disaster and form the look of it on the forums, I'm not the only one with problems, back to betatest ALWIL.
btw. not sure, but my Avast update shortly before i lost my ability to browse.
21-04-2008 23:10:18 1208812218 SYSTEM 1648 The virus database (VPS 080421-1) was automatically updated.