Preview: Inside the Windows XP Service Pack 2 Beta "Internet Explorer will get its own built-in pop-up blocker. Intranets won't be affected, but when you're surfing the Web, IE will block any pop-up or pop-under window that wasn't triggered by your click ( figure 1 ). In the beta, an audible pop signals each blocking event. You can right-click on the pop-up icon in the status bar to configure pop-up blocking or to review blocked pop-ups ( figure 2 ). IE will also add protection against "drive-by downloads"—downloads that occur without your knowledge or permission. If you want a particular download, you simply click a link that appears below the toolbar."
Useful Windows XP SP2 snapshot. FYI the new (beta) pop-up-blocking (and more) MSN toolbar didn't work on my laptop when I tested it last night.