Uncle Roger's worm

A new email worm has surfaced that purports to show screensavers of US spy satellite pictures of Iraq or animations that are either patriotic or that mock President Bush, a computer security company warned on Thursday.

The worm, dubbed Ganda-A, spreads by sending itself to e-mail addresses on an infected machine and tries to disable anti-virus and other security software and infect certain files on the hard disk.

Ganda, which does not appear to be spreading and is rated low risk, sends email in English or Swedish.

It is signed by "Uncle Roger in Hornsand, Sweden," who complains in a message about being discriminated against in the Swedish school system.