PestPatrol was first issued in 2000 by PestPatrol, Inc. Among its unique features were CookiePatrol, which purges spyware cookies, and KeyPatrol, which detects keyloggers. Billing itself as the "Authority in Spyware Protection," it licensed its signature files for use in Yahoo! Companion, Stompsoft's Spyware X-terminator, Research Triangle Software's CryptoStick Software Suiteand others.
The program can be bought separately, or as part of CA Internet Security. Although it could be obtained for free on pirated pages, the risk of malware increases.