Adobe Reader X – An internal error occurred.

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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.

Here is the registry fix to make the changes.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\11.0\FeatureLockDown]