Issue
If you are using Reader 7 you may want to disable the option “Keep forms data temporarily on disk“.
Reason
This prevents form data being cached on the local disk, which may pose data integrity/security risks to enterprise customers.
Solution
There are a few workarounds to disble this functionality:
1. create a registry key to disable the option automatically:
The location is [HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\7.0\Originals].
Create the key named bCacheFormData.
Create a dword value of 00000000.
Close registry and relaunch Acrobat/Reader.
2. Another option is to control this in the form itself using JavaScript
From the Acrobat JavaScript Scripting reference available at http://partners.adobe.com/public/developer/en/acrobat/sdk/AcroJS.pdf#page=219
this.nocache = true;
This will only have an affect in the form context.
3. Your third option is to use the Web browser settings:
Set the preference “Do not save encrypted pages to disk” as checked.
Empty Temporary Internet Files Folder when browser is closed.
Additional Information
This setting has been disbled by default in Acrobat/Reader 8.0 and later versions.
reference: (1-29705311)