tough spyware or virus or... ??? help!!

[bholdr]

I just got back from a vacation, and my computer has been infected by a particularily nasty peice of spyware/adware or something...

Every time i attempt to open up internet explorer, it tries to link to a site "www3.bigtrafficnetwork.com", sometimes opening dozens of windows linking to the same site. i cannot stop it without opening taskmanager and shutting down IE. This has effectivly blocked all of my access to the internet- my poker and casino sites programs are also unable to connect, and i can only assume that it's the same problem. The program appears to attempt to open IE and connect on it's own at times as well, so i have kept my internet disconnected.

What's my play? Spybot has not been able to catch this one yet, perhaps because i'm unable to go online to get updates. I am sick of Norton, and have been considering purchasing the ZoneAlarm security suite. what are the chances that this would help solve my problem? should i hire a professional to come in and take care of it? (i have some other little problems that i'd like to get solved at the same time, too...)

thoughts? i'd like to take care of this as quickly as possible. TYIA.