In this presentation we are going to describe the steps of “How to Disable Attachment Preview in Outlook 2010 ’’. There are simple steps which need to follow by users of Outlook to disable attachment preview in Outlook. Read more :-http://www.msoutlooktools.com/category/attachment/disable-preview/

2. Outlook has a feature that allows users to
preview attachments and documents if the
handler is available for that file type. If you
only wish to disable Attachment Preview for
certain types of files, leave the checkbox
unchecked and click the Attachment and
Document Previewers button. Simple steps
are needed to follow to do the same.

3. Steps to Disable Attachment
Preview

4.  Open Outlook
Click on File >> Options

5.  Select Trust Center tab and Click on Trust Center
Setting

6.  Now, select Attachment Handling tab option
Click the Check the box Turn off Attachment
Preview and click on OK button.

7. Thank You 
Ref more :
http://www.msoutlooktools.com/category/attachment/disable-preview/