Acrobat Reader 8.1.1 cannot be uninstalled

Question

I updated Acrobat Reader to 8.1.2 but had to roll my computer back 1 week for other issues. It now shows Acrobat Reader 8.1.1 twice in my install/remove program list (Windows XP SP2) and I can't uninstall program and can't update to 8.2.2. Also, the shortcut on my desktop opens the program but the icon on the menu bar does not.