Is Microsoft's Firewall Secure?

Pack 2 (SP2), as a valuable way of protecting PCs. But while the firewall is an improvement, it falls short of the standard of protection expected of commercial firewalls, according to some industry observers.

Windows Firewall--which replaces the old Internet Connection Firewall--marks the first time all up-to-date PCs will have a firewall switched on by default, an important step in stopping the spread of viruses, according to industry analysts. However, the software suffers from two major flaws, critics say: it does not block outbound traffic, and it can be switched off by another application, possibly even by a clever worm.