If you find that tabbed browsing is not for you and wish to go back to the way it was, follow this tech-recipe and you will be tab free . . .
1. Click the Tools button, and select Internet Options.
2. Select the General tab
3. Go down to the Tabs section, click the Settings button.
4. Uncheck the Enable Tabbed Browsing check box.
5. Click OK to close the dialog box.
6. Click OK to close the Internet Options box.
7. Close and re-open Internet Explorer.
