Anti-virus firms are warning about a Windows worm called Sober that is starting to spread widely online. The virus emerged at the weekend and is multiplying because so many versions of Windows are vulnerable.
Many people are thought to be falling victim to it because one version poses as an update from anti-virus firms.
It also tries to hide by using many different subject lines in both German and English and by changing the name of the payload holding the virus.
http://news.bbc.co.uk/1/hi/technology/3220887.stm
