Internet Explorer 9 like the earlier version of IE, provides the user with the option disabling the pop up blocker. You can turn off the popup blocker in Internet Explorer 9 using the Internet Options.
Click the Tools menu and select Internet Options from the menu list.
In Internet Options windows, navigate to Privacy tab and then to Pop-up Blocker section.
To turn off the pop-up blocker in IE9, un mark the check box with label as Turn on Pop-up Blocker. Clock OK button to confirm the changes.