Additional MSN Search Toolbar Information When you install Windows XP Service Pack 2 or later on your computer, the Internet Explorer Pop-up Blocker is also added. To prevent possible conflicts, we recommend that you use only the Internet Explorer Pop-up Blocker, and turn off the MSN Search Toolbar Pop-up Blocker. To turn on Internet Explorer Pop-up Blocker: On the Tools menu in Internet Explorer, point to Pop-up Blocker, and then click Turn On Pop-up Blocker. To turn off MSN Search Toolbar Pop-up Blocker: 1. On the Toolbar, click the arrow next to the Pop-up Blocker button , and then click Options. 2. Clear the Turn on Pop-up Blocker check box 3. Click OK. The information above was taken directly from http://search.msn.com/docs