It is not uncommon for people to have trouble downloading these rather large PDF files, especially to older, slower PCs. The most common symptom is for several pages to be downloaded, followed by a crash requiring a restart. If you experience this problem, try using the right mouse button to click the link, bringing up the "download target file to disk" command. After the download is complete, open the PDF file directly from your hard drive with whatever application you prefer for reading PDF files, not from your browser.
If all else fails, contact the webmaster for help.