Adobe 9 Pro crashing in Win7 x64 - and Autosave

Question

I've searched all through the internet and these forums (which do have good info), although I have not found a solution to my problem.
We have a small office of 10 computers with Windows 7 Professional 64bit (on win2008 server domain) each with Adobe 9 professional (all updates and patches installed).
For the most part everything runs smoothly and great, but every so often ( a few times per week) Adobe will crash while working on a large PDF (100 or more pages, with bookmarks, highlighting, etc.) and the user will lose the document they were working on unless it had been recently saved. The crashes are so intermittent and unusual, I'm not concerned with that at the moment... there appears to be no common denomenator in the crash happenings.
What I am interested in is a better Auto-save feature or way to more fully restore Auto-save data files.I've changed autosave to happen every 10, 5, even 1 minutes, but although after the crash happens, Adobe recognizes the autosave and tries to open it, the document is corrupted and of no use, having lost a great deal of information in the original PDF. So, I'm telling my users to constantly click "Save" or Ctrl-S.
Is there a better autosave functionality? A way to not save a backup only data file that can be recovered upon crash, but an automatic save to the current document? Any solutions, ideas or discussion is certainly welcomed here. Thank you for your time and I'm very interested to hear any ideas and/or thoughts!
Dan

Answer 1

Thank you again for the reply. I have been worried it's an x64 issue. Normally everything works so well though. I certainly understand that any program may have issues and crash from time to time.
What would really be helpful is more info on the auto-save feature. I have not been able to find any way to modify its settings (other than on/off and how often). Does anyone know of a way to not merely auto-save a backup, but to have Adobe automatically save an open PDF on a specific interval, equal to ctrl-s to save? Thanks again for any help.