After running bitdefender and allowing it to clean/delete what it can often there is a root dll that generates the unwanted random dll replicating the virus. This can be removed pretty easy as BitDefender nor anything I found will delete it for you.
Follow these steps:
1) run bit defender and allow it to clean up what it can.
2) use CCleaner or hijackthis to clear the BHO
3) Boot to safe mode and go to windows directory locate the DLL bitdefender could not remove. example mine was C:\windows\system32\vrtvur.dll
4) it can not be deleted BUT it can be cut and paste..oversite on virus developers part. Cut and Paste it to desktop.
5) reboot PC and do F8 select windows domain controllers only.
6) once windows starts, bring up task manager and kill the explorer.exe, everything will disappear so don't freak.
7) In task manager select start new task and a dialog will appear, select file types all and click browse button.
8) in open file dialog browse to desktop and locate the dll. highlight it but DO NOT DOUBLE CLICK. right click with dll highlighted and select delete..
POOF Vundo or Win32TratBHO virus main dll is gone. With that deleted virus is dead...
Hope this helps someone as it was driving me nuts..VundoFix, Bitdefender,Avast , Symantec none could get rid of it...This was the easiest and fastest way I could find..
Cheers,