While InPrivate Browsing is activated in a particular IE8 window, two key indicators are displayed. These are both circled in the screen shot above.
The first is the [InPrivate] label that is displayed in IE8's title bar. The second and more noticeable indicator is the blue and white InPrivate logo located directly to the left of your browser's address bar.
If you are ever unsure whether your current browsing session is truly private, look for these two indicators. To disable InPrivate Browsing simply close the newly created IE8 window.