Security advisories:   F-Secure   Kaspersky Lab   McAfee   Symantec   Trend Micro

The rampant W32.Klez.H@mm worm continues its rapid infection spree all over the world. Security companies are reporting extremely high levels of infection among home users and somewhat moderate among corporate users.

If you are running a Windows system, you are strongly encouraged to update the virus definitions of your antivirus software and upgrade your Microsoft Internet Explorer browser.