Adobe Reader X – An internal error occurred.

We had Adobe Reader X on a Windows Server 2012 Terminal server all of a sudden coming up with ‘An internal error occurred.’
After Some research Found that Disabling the Adobe Reader X sandbox protection resolved the error.
More about the feature can be found here – http://www.adobe.com/devnet-docs/acrobatetk/tools/PrefRef/Windows/Privileged.html#idkeyname_1_10186

Here is the registry fix to make the changes.

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Windows Registry Editor Version 5.00
 
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\11.0\FeatureLockDown]
"bProtectedMode"=dword:00000000