Download Adobe Acrobat Reader for FREE
You need acrobat reader to be able to open pdf files. PDF files are used because you can send a lot of information via a pdf file attachment without taking up a lot of kilobyte space. Find acrobat reader on your C drive ( I store mine in a file called Adobe because Adobe makes it). Open acrobat reader, go to file menu and come down to "open" ; find the document in pdf format you wish to open and bingo; it opens for you to read.