This is obviously a very hard one to remove, I found countless references to the same problem on a number of malware remove sites. Here is one thing we haven't tried;
  1. Download VirtumundoBegone and save it to your desktop.
  2. Now reboot into Safe Mode.
    1. This can be done tapping the F8 key as soon as you start your computer
    2. You will be brought to a menu where you can choose to boot into safe mode.
    3. Select safe mode with networking using your arrow keys on the keyboard and then press enter.
    4. When you computer reaches the desktop make sure you log in as the same user which you had performed the previous steps,
  3. Once you are logged into safe mode, double-click VirtumundoBeGone.exe file you just downloaded and follow the instructions.
  4. Exit when it has finished, and reboot back to normal mode.
Once you have done this run another HJT scan and post the log here...with your fingers crossed