Cheers for the help mate, I'll give it a go!
Sorry you got no help with your problem. I did a Google search that may be helpful with the derbiz malware.
The first item listed gives instructions for manual removal... perhaps there is other information as well. If you have other problems then post a current HiJack This log at one of the sites dedicated to HiJack This. This forum is not equipped to analyze and give solutions to HiJack This logs.
Hope this helps. Thanks for being a new member... hopefully next time you will get better help.