Updated to the latest version of Adobe Acrobat Pro (to 9.3) and it started crashing on me. Got a runtime error and then adobe would crash. After searching the internet I found a blurb which fixed it right away.
“In Win 7 the Application Data folder has a restriction on it. The account “Everyone” has a special permission of “Deny”. If you modify the permission for “Everyone”, the Deny checkmark is on the “List folder / read data” line. Remove the checkmark on the Deny for that line. Acrobat will now work.”
Hope this helps someone!