A new computer virus is spreading across the internet via e-mail and file-sharing programs, computer security experts have warned. The mass-mailing worm, dubbed Fizzer, is rapidly infecting computers using the Windows operating system in Asia, Europe and the US. Experts say it is a complex virus which can disable anti-virus software, steal passwords typed on a keyboard and even open a back door to a computer. People are advised to update their anti-virus software and be wary of e-mails from unknown sources. Full Story