My bundled copy of Adobe Acrobat 5.0.5 is stuck in a loop. I'm going to install the latest version and hope that the new software won't have this problem. It looks like a typical Microsoft error message.
It was displaying this message every time I tried to load the program, either by manually opening it or by opening a PDF file. It also ignored the option to disable the message. I installed Acrobat Reader 6.0 and deleted the old version, which solved the problem.