As still u r that the virus still on the system .. did u try and scan for virus in safe mode ... if not u can try and scan for virus in safe mode .. bcoz activity of virus will be less and most of the virus can be removed from the safe mode... to boot to safe mode ..start your computer when u see the dell logo ...keep taping the F8 on the keyboard . and in the advance option choose safe mode .. log on as administrator then scan for virus.. and this will remove ...it .. or else go to macfee web and download the fix for your virus ,,this will help u