I have just got rid of the MSBlast worm by enabling firewall,
downloading patch, virus scanning & Cleaning etc. etc.

I am rid of the virus but now the computer will not shut down or log
off the users. It will go into hibernation and I have found that on
wakening the shut down option on the user/menu screen works.

The log off / shut down option when on the desktop of individual users
seems to be disabled, obviously as a result of fixing the virus.

Any ideas how to re-enable??