When I try to get Object Information Window to open, I click on the icon, but the screen does not appear. Is there a function I have to turn on to have the Object Information Window display?
Do you use (or have you used) a 2 monitor setup? if so, the information window might be "offscreen". You can restore the 2 monitor setup and move it back onto screen 1. Or you can use Preferences -> User Interface -> Layout -> Reset window position to get it back. Just be aware that this option may also reset some other window/dialog box positions.
Just remembered another trick to move a window around: if you are sure the info window is open but offscreen, press Alt + spacebar + M
Your cursor will turn into a 4 headed arrow. Use the keyboard arrow keys to move it around back into view.