Suddenly unable to open PDF in IE11

Question

Hello,
Today I started having a problem opening PDF files in IE11.  I have Adobe Acrobat Standard version 9.5.5 (not reader).  I get the following error messages:
It appears to be a security issue so on a whim, I browsed for iexplore.exe, right-clicked and selected "Run as administrator" and tried again and it worked as it should. 
Where do I go from here?  I ran a repair install on Acrobat and it didn't help.  How do I run IE as admin all the time?  Do I even want to do that?  Any ideas would be appreciated.
Thanks,
John

Answer 1

Hi,
You can try steps "To Set "Run as administrator" in Compatibilty Mode Properties" in following article to always run IE as admin:
http://www.eightforums.com/tutorials/9564-run-administrator-windows-8-a.html
But to figure out the root cause of the issue, I suggest we try Process monitor to capture the behavior when your open PDF in IE 11．
Download: Process Monitor v3.05
http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx 
You may find the access denied error for some files when you try to open PDF in IE11, and follow steps in this article to take ownership of them to solve the issue:
Solving Access Denied Errors Using Process Monitor
http://improve.dk/solving-access-denied-errors-using-process-monitor/
Hope these could be helpful.
Kate Li
TechNet Community Support