Windows 7 machine and adobe acrobat 9 problem

The problem here is that, after you open the attachment, it's treating it like a "Temporary Internet File", and the path that you reference is the OUTLOOK temporary internet file location.  It keeps attachments in this location so that when you select "DRIVE CLEANUP", it knows that it can clear this location with impunity.

If you right-click and SAVE AS the attachment BEFORE opening in (as in from the message and NOT from Acrobat after you've already opened it) I think that the save location will be more in line with what you were expecting (like MY DOCUMENTS).

I use foxit pdf veiwer as acrobat is way to top heavy for a simple pdf veiwer
http://www.foxitsoftware.com/pdf/reader/
its very small in comparison and as yet I have found no problems

I understand about Right clicking and it does give you more options can you make it default to a certain location everytime instead of the desktop?

I assisted another member here with a similar inquiry... see if this is an acceptable solution for you as well.

https://www.experts-exchange.com/questions/27055039/How-to-change-default-save-location-in-Acrobat-Pro-9.html

N/M the above. Let me see about something else that might help...