But it could do nothing to Virut.
Some variants, yes, unfortunately.
It is not certain safe mode removal will help either. Best bet is find an not-infected computer, burn an bootable antivirus CD, and then scan infected PC with that. Then Windows repair.
Sometimes, only formating...
Bootable CD. Read the instructions, download and burn (maybe from another computer), finally use one of this rescue CD's:
1.
Avira2.
Kaspersky3.
BitDefender4.
F-Secure5.
Dr. Web