Very nasty Windows virus going around: W32/Bugbear.b@MM
Be sure your virus definition files are up-to-date.
More info and a cleaning program are available from Symantec:
http://securityresponse.symantec.com/avcen...gbear.b@mm.html
"This is a complex worm that contains many different elements:
Mass-mailer
Network Share Propagator
Keylogger
Remote Access Trojan
Polymorphic Parasitic File Infector
Security Software Terminator"
McAfee link:
http://vil.mcafee.com/dispVirus.asp?virus_k=100358