it seems that the worm/virus is still there. using google, I get this link,
not exact same as ur situation, but should be kinda related. http://www.atomicmpc.com.au/forums.asp?s=2&c=9&t=2130
It seems that u definitely need to install norton or sth else to get rid of i
t.
And ask ur boss to buy a better antivirus software and keep it updated.