1.Close any open windows or programs
2.Click Start
3.Click Run
4.Type: regedit
5.WARNING: Registry editing is for experienced computer users only. Mistakes made in the registry can render your computer and Windows useless. Proceed at your own risk.
6.Click the “+” sign next to HKEY_CURRENT_USER
7.Click the “+” sign next to Software
8.Click the “+” sign next to Microsoft
9.Click the “+” sign next to Internet Explorer
10.Click TypedURLs
11.Delete all the URLx (e.g. URL1, URL2 and so on) that you do NOT want to see in the address bar
12.Close the registry editor.

http://helpmerick.com/delete-only-one-entry-from-internet-explorer-address-bar-history-video-tip.htm