If you have recently installed the latest version of Google Chrome, and are using this as your main browser, you may notice that if you download and open a PDF it will open in a Chrome window rather than Adobe. Chrome includes a built-in PDF viewer that does not integrate with NetDocuments. This plugin must be disabled in order to use your Adobe PDF viewer.
In order to disable this plugin, type into the Chrome address bar Chrome://plugins.
You will see:
Disable the Chrome PDF Viewer, and enable the Adobe Reader/Acrobat PDF Plug-In.
You may need to restart chrome for these changes to take affect.
NOTE: If you have both of these PDF Viewer plugins disabled, you will not be able to view pdf documents in the browser but will be prompted to download them. See this article for more information.