If a blank page opens when you click a link to a PDF in Internet Explorer 10 or Internet Explorer 11, you may have disabled Acrobat or Reader for this website.
Microsoft introduced Enhanced Protected Mode (EPM) in Internet Explorer 10 and included it in Internet Explorer 11. EPM is enabled by default in Internet Explorer 11. When EPM is enabled, you may see the following message when you click a link to a PDF:
"This web page wants to run ‘Adobe PDF Reader’ which isn’t compatible with Internet Explorer’s enhanced security features. If you trust this site, you can disable Enhanced Protected Mode for this site and allow the control to run."
“Don’t run” disables Acrobat or Reader for this website (domain). Acrobat/Reader is disabled for all PDFs on the site. After you click Don’t Run, a blank page displays whenever you click a link to a PDF on the website.
To re-enable Acrobat or Reader for this website, delete the browsing history in Internet Explorer.
The next time you click a link to a PDF on the same website, Run control | Don’t run options are again presented on the website. Click Run to view PDFs in Internet Explorer 10 or Internet Explorer 11 with Enhanced Protected Mode enabled.