I would be very tempted to go to somewhere like Spybot forums and post a HiJack this file - or rather follow the suggestions there.

My son managed to install a root kit on my machine some while back by clicking on something or other and my machine was merrily working away and sending stuff all round the internet without me controlling it. I had a firewall; anti spyware stuff; anti virus etc etc all of little use! The person who helped me there was wonderful. There are all sorts of useful tools out there to help (like combofix - Malwarebytes - all sorts of others) but it's probably good to get someone who knows what they are doing to point you in a good direction.