We are having problems with hyperlinks in PDF files.
When clicking on a link in a PDF file the following message appears:
"The file and its viewer application are set to be launched by this PDF file. The file may contain programs, macros, or viruses that could potentially harm your computer. Only open the file if you are sure it is safe. If this file was placed by a trusted person or program, you can click Open to view the file."
There is a box that says "Do not show this message again", but selecing this box does not stop this message from appearing next time.