I cannot open a .pdf in an incoming mail (Outlook 2010) with Acrobat Pro XI. It will only allow "preview". I have to copy and paste the .pdf to my desktop and then open it. What do I do to restore the 2x click in Outlook to open the .pdf? thank you

Question

I cannot open a .pdf in an incoming mail (Outlook 2010) with Acrobat Pro XI.  It will only allow "preview".  I have to  copy and paste the .pdf to my desktop and then open it.  What do I do to restore the 2x click in Outlook to open the .pdf?  As of now, I get the following bracket opening on screen when I click on the Acrobat icon for attachment within the email:  Thank you
Adobe Acrobat has stopped working
Windows can check online for a solution to the problem.
-Check online for a solution and close the program
-Close the program
Problem signature:
  Problem Event Name:                        APPCRASH
  Application Name:                             Acrobat.exe
  Application Version:                           11.0.7.79
  Application Timestamp:                     536b812b
  Fault Module Name:                          Acrobat.dll
  Fault Module Version:                        11.0.7.79
  Fault Module Timestamp:                  536b80ff
  Exception Code:                                  c0000005
  Exception Offset:                                00cbf281
  OS Version:                                          6.1.7601.2.1.0.256.48
  Locale ID:                                             1033
  Additional Information 1:                  0a9e
  Additional Information 2:                  0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:                  0a9e
  Additional Information 4:                  0a9e372d3b4ad19135b953a78882e789
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Answer 1

Hi Gary,
I have seen this issue occur with users who have this registry setting missing or have improper permissions.
When you double click the attachment to launch the pdf it is saved and opened from the temporary folder unless saved specifically to a location.
If you dont have the below mentioned registry key or improper permissions then attachments fail to open.
Please  heck if the following reg key exists:
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security
or
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\Outlook\Security
Value Name: OutlookSecureTempFolder
If the value exists, and if the value contains a valid path, Outlook 2010 uses that location for its temporary files.
If the registry value does not exist, or if the value points to an invalid location, Outlook 2010, Outlook 2007, or Outlook 2003 creates a new subdirectory under the Temporary Internet Files directory and then puts the temporary file in the new subdirectory. The name of the new subdirectory is unknown and is randomly generated, depending on your version of Outlook.
Please check the following key:
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security
Note the location for: OutlookSecureTempFolder key
Check if the same folder exists in the following location and if not create a corresponding folder in the location on C:\Users\<User account name>\Appdata\Local\Software\Microsoft\Windows\......
Regards,
Rave