Disable Chrome's built-in PDF viewer

If you experience issues when you open encrypted PDF files using Google's Chrome browser, please adjust Chrome Site settings to turn off the built-in PDF viewer.

Select Download PDFs in Chrome

Open the Customise and control menu from the Chrome toolbar and select Settings.

Alternatively, type 'chrome://settings/content/pdfDocuments' into the Chrome browser address bar to quickly open PDF documents settings, then select Download PDFs.

Select Privacy and security, then Site settings:

Open Additional content settings then PDF documents:

Select Download PDFs:

Close the settings tab.

Ensure that the latest version of Adobe Acrobat Reader (http://get.adobe.com/reader) and the FileOpen plugin (http://plugin.fileopen.com) are installed.