You should uninstall this pop-up blocker right away.
If you don't know the name of the blocker then how did it find it's way to your computer? This represents a security risk of your computer and your personal information as this blocker may be malware that's phoning home your passwords, keystrokes and all sorts of sensitive information (like the sort that's available through sites that allow you to find out about your health coverage.) Scan for viruses and see if the blocker or anything related to it comes up.
And even if it isn't malware, the blockers job is to perform only the tasks you want and offer an interface that's easy to use and facilitate even further manipulation of the program to your desires. Sounds like the blocker you have doesn't do any of that.
...and while you're uninstalling the blocker you should download
Firefox which has an easy to use pop-up blocker that tells you when it's blocking a site and allows you to show the site if you'd like...