Hi
Download RustBFix from one of the following locations...
http://www.uploads.ejvindh.net/rustbfix.exe
http://uploads.ejvindh.andymanchesta.com/Rustbfix.exe
...and save it to your desktop.
Double click on rustbfix.exe to run the tool. If a Rustock.b-infection is found, you will shortly hereafter be asked to reboot the computer. The reboot will probably take quite a while, and perhaps 2 reboots will be needed. But this will happen automatically. After the reboot 2 logfiles will open (c:\avenger.txt & c:\rustbfix\pelog.txt). Post the content of these logfiles along with a new HijackThis log.