In SharePoint 2010, most users cannot open the PDF file in a browser when clicking on the Name column. This blog post will give you a tip on how to open it.
A PDF file has been saved to the Shared Documents library. Since this file is a security risk, the browser cannot open when downloading a PDF stored in the library using the ‘Save’ button.
Go to your server, open SharePoint 2010 Management Shell, then Run as Administrator:
Enter the following commands into the form:
$webApp = Get-SPWebApplication(“http://yourservername”)
After that, you can return to your site in the browser and open the PDF file once again.