Your pop up blocker should have a reset for the counter. Where it shows how many were blocked on a 3rd party blocker you would drop down a menu for turning it on or off and the settings options there. For the builtin blocker found in IE that option seems to lack until you disable it, close out IE, and re-enable it after opening up IE again for a fresh count if it counts. I have always used a 3rd party blocker to allow specific windows to open when needed.