Pest Patrol has been around for some time, and was recently acquired by Computer Associates, leading to it now having perhaps the longest and most unweildy name of any anti-spyware package on the market today. What we've reviewed is more or less the personal version of the company's enterprise product, reviewed here.
We installed a boxed CD version of Pest Patrol Anti-Spyware 2005; it's also available as a downloadable package from the Pest Patrol Web Site. One sensible thing that Pest Patrol does during installation is force a check for updates as part of its installation procedure; that way when you do your first scan, you're theoretically protected from the most up to date spyware problems that CA knows about. During our testing, Pest Patrol indicated that a system reboot would be mandated once updates had finished, although curiously it failed to actually do so on our test Windows XP Pro machine. One manual reboot later, and we were ready to get to grips with Computer Associates eTrust Pest Patrol Anti-Spyware 2005. Just try saying that fast five times -- we dare you. For the sake of brevity, we'll just call it Pest Patrol 2005 from now on.
CA's background is in corporate/enterprise level applications, and while Pest Patrol is an application that's been acquired by CA rather than internally developed, you can still see that enterprise level thinking in Pest Patrol's interface. The Welcome screen is relatively empty, and seems more pre-occupied with making sure that your subscription is up to date than in getting you to perform an actual spyware scan.
Pest Patrol 2005's Scan interface offers only two basic options -- a Standard Scan, which checks typical spyware locations, and a Custom Scan, which performs a Standard Scan as well as checking user-selected drives. From here you can also schedule a scan on your chosen system.