Highlight everything that's currently in the address bar, then use the keyboard shortcut Ctrl V ( That's assuming you've already copied something using Ctrl C or Edit > Copy)
If you run into more troubles with Internet Explorer, give Firefox a try.
(Yes, you can have more than one browser on your computer at a time - I have 3!)
Free, fast, a small 5mb download, Firefox blocks pop-ups and sites from secretly installing programs on your computer. It will copy over your settings from other browsers (cookies, settings, bookmarks). Firefox is powerful too, it's more up-to-date than even IE7 according to the web standards (w3.org).
The main reason I like Firefox is because it's customizable.
Why is customizability important?
Imagine being able to do 2 small things and never seeing a banner ad, flash ad or an iframe ad again? (Remember, pop-ups are already gone)
Imagine being able to pause your computer's music player when the phone rings without having to switch to it?
u just simply push ur left mouse button and drag through the address, so it highlites from the "www" till the ".com" or whatever it is on the end. then: combination of the ctrl+c button=copy, ctrl+v= paste