I connected to the Internet and turned off "Show Content Guide Automatically". It did not work.
If you managed to access the "Preferences ..." area to turn the "Guide" off and your were able to access the "QT Preferences ..." area to enter your Pro registration, then the QT application must have loaded/opened at least once and you can now turn the Internet connect back off.
In fact, I cannot open the QuickTime program at all. When I click on the QuickTime icon in the Dock, nothing happens.
Does the aplication name "QuickTime Player" appear in the Menu bar at the top lefthand of the screen next to the "blue Apple?" If so, that is all that is supposed to happen now when you click on the QT application icon in the dock. (I.e., no player will open unless you manually open one from a menu option or double-click on a QT compatible file set to open with the QT Player.)
I upgraded to QuickTime 7 Pro thinking this might get the program working, and when I entered the Registration Key, it did nothing.
Not sure what you were expecting here. If the key was properly entered, it should now be plainly visible in the "QT Preferences... > Register" window. In addition, the words "Quicktime Pro 7" should appear immediately below the key entry line in this window, the word "Pro" should now be superimposed on the big blue "Q" in the "About QuickTime Player" window, and the word "Pro" should be removed from all of the previously non-functional menu options like "Export" and "Show Movie Properties." The problem here is that many people think "Pro" registration gives you an entirely new and separate application when, in reality, all it does is "unlock" capabilities built into the QT Player that are normally turned off for the unregistered user.
The version of QuickTime that I have is 7.1.3. Do you think I should uninstall the program and reinstall it?
Would ask that you check on and answer the above questions first to ensure that application is not really working at this time. Describle what you can or cannot see or do -- particularly with regard to the application menu bar indicators/Pro activity indicators. Also post any messages (modal or other) that may be displayed. Would hate for you to attempt to attempt an uninstall/reinstall unnecessarily here with all the problems others seem to be having. I am working on the oldest PPC G5 2.0 GHz model and have had no problems so I cannot fully test/attempt to dubplicate problems you may be have with latest Intel models. In any case, just wanted you to understand what you should be seeing and go from there.
