Well, to see what this virus does, look through the Combofix report and look at all the legit windows files that where infected and replaced. Looking at the ESET log, there are many more files infected including entire programs.

Exactly what this virus stole if anything is hard to say but change all your passwords.

This is a file infector virus, it will infect files as quick as we clean them and I am sure there are 100s of more that are infected that we cant see.

Upgrading to Win 7 would be a good option but I am not sure if your computer is a candidate. It would have to be a compete format and reinstall , an upgrade would not work or you would just be installing the new operating system right on top of the infected one.

You may want to contact Dell for Recovery Disks to restore your computer to factory defaults.

Post here and let them know where your at and see what they suggest, all us forums work together so you can link them to this thread so they can see what we have done.
http://forums.whatthetech.com/index.php?showforum=119