Hi,
Thank you for your enquiry.
I have tested your web site on a number of different system configurations, but the links to the PDF files work as expected. This would suggest that the problem is related to user permissions or an incorrect configuration of Adobe Reader.
What happens if your friend tries to access one of the PDF files directly (i.e; without going through the main site)?
If visiting
http://www.kinetic.gb.com/ContactCentreTechnologyAssessment(Free).pdf also throws up the error, I would recommend uninstalling all versions of Adobe Reader (or Acrobat Reader) from the machine, then installing the very latest version of Adobe Reader 6.0 which is available from
http://www.adobe.co.uk/products/acrobat/readstep2.html to see if this resolves the issue.
Please let me know how you get on.
Kind regards,