Pop-Up Blocker is a feature of Yahoo! Toolbar that blocks unwanted pop-up windows. You must have Yahoo! Toolbar version 5.3 or newer for Internet Explorer in order to use Pop-Up Blocker. To see what version you're using, click the Pencil menu () and select "About Yahoo! Toolbar".

To get the latest version of Yahoo! Toolbar, please go to the Yahoo! Toolbar page.

For more information on Pop-Up Blocker, including what types of pop-ups it blocks, troubleshooting common problems, etc., visit the Pop-Up Blocker Help page.

Note: Pop-Up Blocker is not available for Yahoo! Toolbar for Mozilla Firefox. Mozilla Firefox has a built-in pop-up blocker and does not require an additional one.