Taken from teh BBC web site
A new virus which first appeared just before Christmas is infecting thousands of computers across the world.
The spread of the Windows e-mail worm, called Yaha.K, has led anti-virus firms to classify it as a high risk.
The virus has now been reported in 100 countries, predominantly in the UK and the Netherlands, according to MessageLabs which scans messages for viruses.
It spreads by e-mailing itself to everyone in your address book. It may also try to shut down anti-virus programs.
Computer users are being advised to delete any suspect e-mails they receive, as well as updating their anti-virus software.
