When I try to upload a excel sheet to convert to a editable PDF the upload box just quickly blinks forever. Then tells me that Acrobat could not create the PDF form. Thoughts?

The first thing that comes to mind is that another dialog box has opened up behind your currently visible windows.  It happens to me from time to time, and looking at the task bar will offer a way to click on, and bring the dialog box to the front.

My best,

Dave