Outlook 2013 attachment prompts

I'm running Outlook 2013; how do I disable the prompt for attachments regarding "trustworthy source"?  The checkbox labeled "Always ask before opening this type of file" is grayed out. I can't find a setting in Outlook options to fix this.
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JohnBusiness Consultant (Owner)Commented:
Can you post a screenshot of this message?

In Outlook 2013, Options, Trust Center, Attachment handing:  Are the options set to download attachments?  Look through these options and set them and then see if your issue is resolved.
CTmountainbikerAuthor Commented:
JohnBusiness Consultant (Owner)Commented:
Try also in Trust Center, Automatic Download and uncheck the main setting. Then you may see fewer of the Trusted Source windows.
CTmountainbikerAuthor Commented:
The only way I got around this was to run Outlook in admin mode; I was then able to uncheck the box.

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CTmountainbikerAuthor Commented:
nothing worked!!
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