has been tweaked since the last release. It has been updated to better identify keyloggers. In PC Magazine testing, Norton successfully detected all 11 spyware threats and removed all but two. PC Magazine did give Norton credit even when manual removal was required. The suite removed three of four commercial keyloggers. When attempting to install the spyware on a clean system, Norton blocked all 11 and two of the four commercial keyloggers. In most cases, it did not block the installation, however Norton did call for a scan after the spyware was installed. In PC Pro testing, Norton detected 78 percent of spyware, removed 82 percent, and blocked 65 percent from installing. Norton AntiSpam was discontinued as a separate product from Symantec, now only available in Norton Internet Security. The feature could block all e-mail from unknown senders, and automatically blocks messages with suspicious elements such as invisible text, HTML forms, and phishing URLs. To improve accuracy, Norton analyzes outgoing e-mails and messages whose categorization was corrected by users by hitting the "This is spam" and "This is not spam" buttons. In PC Magazine testing, the feature marked one in ten valid e-mail as spam and let one in every six spam messages in the inbox. 400 messages were used, and the program was allowed to process the messages for over a week. In PC Pro testing, the feature performed better, blocking 96 percent of spam, with a false positive rate of 0.2 percent. Norton recommends disabling the Windows Firewall to avoid redundant alerts. The firewall stealthed all significant ports in PC Magazine testing. Attacking the firewall itself was unsuccessful, and PC Magazine was unable to stop its service, terminate its process, or disable the firewall using simulated mouse clicks. The firewall passed PC Pros tests, successfully stealthing all ports. Other features included Bloodhound technology, which looks for virus-like behavior to better find zero day viruses. The Security Inspector looks for common vulnerabilities, including insecure user account passwords and browser insecurities. Advertisement blocking rewrites a website's HTML to prevent advertisements from being displayed. Parental controls, an optional component, could block certain programs from accessing the Internet, such as IM clients, and restrict newsgroup access. Restrictions could be assigned to different Windows users accounts. Sites were classified in 31 categories, and the four profiles which could be assigned each block different categories of sites. Supervisors define exceptions, add global blocked sites,