Hi Kevin ,
You can right click on that PDF and select open with " Adobe Reader".
This will open the PDF in Adobe Reader.
I believe Acrobat must have been set as your default PDF viewer and that is the reason you are facing challenges while viewing a PDF.
Follow the above steps .I am sure that will help.
Moreover,Adobe reader is a free software from Adobe .If you don't have it installed in your system ,you may get it from the web.Here is the link for the same.
Regards
Sukrit Dhingra