Somehow the address line in MS Explorer has disappeared. I have checked "View/ToolBars" and the "Standard Buttons" and "Address Bar" are checked; however the two places that look like they would take a web address take me to either the Yahoo or MSN search sites.
How do I get the address line back in?

jhl

Registry problem

See this article.

http://support.microsoft.com/kb/555130/en-us

If you don't want to edit the registry then you can uninstall, then reinstall MS Explorer. That should also fix the problem.