Anti-virus specialist Symantec has revamped its line of internet security software products, answering fresh demand for greater network protection from consumers. The products were launched last week as Microsoft acknowledged the existence of key flaws in every version of its software based on the Windows NT 4.0 code, including Windows XP, Windows 2000 and the recently released Windows Server 2003. 'Users are at risk from an increasing number of internet threats such as the recent Blaster and Sobig worms,' said Norman Kohlberger, Symantec's senior regional product manager for Asia-Pacific. 'This increase in attacks is driven in part by the popularity of always-on broadband services and laptop computers. In Hong Kong, this posts a greater challenge as there are more than a million customer accounts with broadband access,' said Mr Kohlberger. In response to those threats, the Silicon Valley-based Symantec has introduced new and improved versions of its Norton line of security software. Shipping later this month, Norton Internet Security 2004 was developed as an easy-to-use and comprehensive online security and privacy suite for home and small office personal computer users. This product includes Symantec's anti-virus, firewall, intrusion detection, privacy protection, spam filtering and content filtering programs in a single software suite. Norton Personal Firewall is a program designed to help laptop users get immediate protection from online threats regardless of which network they connect to. Also set for release later this month is Norton SystemWorks 2004, Symantec's productivity and problem-solving software that includes a new password-management tool. This new version also offers added protection from certain 'non-virus' threats, such as spyware, adware and keystroke-logging programs - all of which compromise the security of a computer system, either by spying on users' private data or tracking users' online behaviour. Symantec also wants consumers to effectively tackle the growing spam problem, with the wide release of its new Norton AntiSpam 2004 program later this month. Mr Kohlberger says this new product 'helps reduce unwanted e-mail by identifying it right at the desktop'. MessageLabs, an enterprise e-mail protection services firm based in Britain, has estimated that up to 70 per cent of spam is now delivered through so-called 'open-proxy' machines - computers that have been hijacked by spammers through new malicious codes such as Sobig - to send large amounts of spam messages. Research firm Gartner said the new vulnerabilities identified by Microsoft would be exploited by virus writers, and these attacks would appear even more rapidly than the recent Blaster worm, which recently shut down tens of thousands of PCs and servers around the world.