The article [Q843015] explains that after you install SP2, pop-up windows may still appear, even though the default Pop-up Blocker feature is turned on, may occur for the following reasons, and discusses a method for resolving the issues:
? You click a link that opens a pop-up window.
? The Web site where the pop-up window originates is either in the Trusted sites Web content zone or the Local intranet Web content zone. Because Web sites in these zones are considered safe, their pop-up windows are never blocked.
? The pop-up window is opened by software that is running on the computer.
? The pop-up window is opened by ActiveX controls that are enabled from a Web site.
Note: Please review, "Block Pop-up Windows with Internet Explorer" and "How to configure the Pop-up Blocker in Internet Explorer (Q843016)."
Caveat: Internet Explorer add-ons are software components. When you visit a Web site, add-ons may be downloaded automatically, you may be prompted to download add-ons, or you may be directed to visit a Web site to obtain the latest add-on. These components may be third-party ActiveX controls that extend browser functionality or that provide special user interface elements in IE. The article [Q883256] describes how to control add-ons by using the Manage Add-ons feature of SP2, describes how to use and how to troubleshoot its features.