Setup took just 11 minutes--including a 2-minute preinstall scan--in our tests. The main reason for the speedy setup was that PC-cillin didn't run a postinstallation scan, which we ran manually. (Most antivirus programs also do a full-system scan immediately following installation, and we wish PC-cillin did also.) Including the manual scan, setup time totaled 30 minutes, still much shorter than with F-Secure Internet Security 2005 or Norton AntiVirus 2005, each of which took more than an hour to install. McAfee VirusScan 9.0 installs without prescanning your system and took only 5 minutes in our tests.

The PC-cillin interface is intelligently organized and simple to browse. The main Summary screen provides a quick overview of your computer's protection level: green check-mark icons mean your antivirus, firewall, and other security settings are safe; red exclamation-point icons indicate trouble. A left-side column provides fast access to individual security components, including the e-mail scanner, firewall, and spyware detector. We do have one gripe, however. The spyware feature was turned off by default, forcing us delve into the settings to activate it. Furthermore, the Summary screen gave no indication that spyware detection was off; we discovered this for ourselves.
PC-cillin Internet Security 2005's core strengths include an aggressively low price, a generous assortment of security tools, and speedy, reliable virus scanning.
Spyware scans in PC-cillin operate two ways: either during virus scans or via a separate, spyware-only scan. PC-cillin wisely takes a cautious approach with spyware, a vague (if ominous) term used to describe everything from advertiser-supported software to malicious dialers that surreptitiously connect your PC to pay-per-call sites. When PC-cillin detects potential spyware, it gives you the option of deleting the program or going to Trend Micro's support site to learn more about it. We found that two of three "spyware" threats on our PC were, in fact, adware programs required to run free, ad-supported applications.
PC-cillin 2005 has added some new tools, including Home Network Control, a dialog box that lets you manage the security of all PCs on a home network via a single interface. This feature is easy to use but requires the $89.95 PC-cillin Internet Security 2005 Home Security Pack, which allows you to install PC-cillin on up to three PCs. The new Wi-Fi Intrusion Detection alerts you when a bandwidth thief (or other intruder) enters your wireless LAN and begins surfing your Internet access for free; you can lock out rogue surfers with the click of a button. And the new antiphishing software prevents naive users from surrendering personal and financial information to known rogue sites, by safeguarding personal data such as credit card and social security numbers.
In CNET Labs tests, Trend Micro PC-cillin Internet Security 2005 produced zero system performance drag, equaling EZ Antivirus 2005 in this regard. And PC-cillin also took much less time to scan our 1.3GB hard drive than did F-Secure, Norton, or McAfee.