Open File - Security Warning

From my brain

Started getting this all of a sudden about a week or so ago after I ran a manual Windows update for the first time in a month. In that time, we'd also migrated the office over to Outlook 2003, but we're still using Access 97.

I managed to find the solution buried here on this page.

Run gpedit.msc, and go to Local Computer Policy\User Configuration\Administrative Templates\Windows Components\Attachment Manager and enable "Default risk level for file attachments", and then enable "Inclusion list for low risk file types" and add to this list the file extensions that you want to open without triggering this crap.