Note: if you are having a problem opening PDFs with the Adobe Reader, the problem may be in the program, not your computer. As an alternative to Adobe Reader, we recommend the free Foxit Reader.
You may download Foxit Reader free at the link below. At the end of the installation, be sure to check the box that makes Foxit your default PDF reader.
(Choose the orange "FREE DOWNLOAD" button on the right side of the page )