cnw,
Do not be discouraged! We will get your system running clean. It may take a bit of time because we are not physically present to sit at the computer. We have to use the Question and Answer method.
Viri sometimes do not cooperate with our efforts. We then do not give up, but try a new method. We are all susceptible to them.
I myself just finished removing a trojan Adware.ncase from my registry. Don't know how I got it on my laptop, but Avast caught it!
To give you an idea of the things we do to help users cure their ails....
Right now, I have 3 computers running while helping another user with a virus problem.
I use one as the 'test bed', the second for general research, and the laptop for fast communication.
I have a reputation for not giving up on a problem, so don't you give up either. You have a nice system and a good OS which works great with Avast.
We'll get it to work.
I will get back to you shortly on the virus you now have.
Have you installed A-2 yet? ((Freware anti-trojan scaner))