[kall]

A new Internet computer worm has infected millions of computers causing major disruptions over the weekend.

Computer security experts have warned that the virus may spread rapidly when businesses resume work on Monday morning.

Named Sasser, the worm, began to spread on Saturday, and unlike a virus does not travel through e-mails or attachments.

It can spread by itself to any unprotected computer linked to the Internet.

The virus attacks through a flaw in recent versions of Microsoft's Windows — Windows 2000, Windows Server 2003 and Windows XP — and causes the computer to shut down, then rebooting it, repeating the process several times.