Cannot open PDF attachment from Outlook client

My user always seem to get the error below when trying to open a PDF from Outlook. At first, we thought it may be McAfee Anti-virus blocking it, but we disabled that as a test, and tried launching it again to no avail. The user mentioned she has to drag the file out of the email, then click the actual Adobe icon to open it. Why is she not able to open it from her email client?

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Which version of Adobe Reader or Acrobat are you using and on what version of Windows? Have you tried uninstalling and reinstalling Adobe Reader or acrobat? If not try it and make sure you restart your computer after the uninstall and again after the reinstall. Don't ask me why but the restarts sometimes tend to make a difference when resolving issues like these.

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*** Hopeleonie ***IT ManagerCommented:
We had the same problem. You will have to create a new Outlook profile.
Jackie ManIT ManagerCommented:
Quit Outlook and make sure Outlook.exe is not in the process list.

Install and Run OutlookTempCleaner and remove all temporary file for attachment.

Restart Outlook and you will have no problem for opening attachments.
Did your client follow the instructions in the error message?
joukiejoukAuthor Commented:
We found out that McAfee TIE module installed on client machine is the culprit. McAfee is creating a new build for it, and we will deploy to all machines affected.
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