Recently my computer crashed. When I attempted to install Acrobat on a new computer I received a message that said I "first must install Microsoft Powerpoint." PowerPoint WAS installed already. I'm not sure what's going on.

Recently my computer crashed.  When I attempted to install Acrobat with Presenter on another machine I received a message that I needed to first install Microsoft Powerpoint in order to run Presenter.  The problem is that Powerpoint WAS already installed.  I tried this on two different computers and received the same message each time.  Any ideas what's happening here?