Microsoft claims success over Blaster virus

Microsoft has claimed victory over the Blaster virus - but has warned of more problems if users do not act to fix a hole in its software. The virus is believed to have been written by computer hackers with a grudge against Microsoft and has so far affected an estimated 300,000 PCs worldwide. Unlike previous viruses, which arrived as an email attachment, the Blaster 'worm' tunnels in undetected via an internet connection. It was designed to launch an attack at midnight local time.