MS Office programs keep a list of disabled files that have caused errors when previously opened. A user can remove documents from this list by accessing the list through the
Regarding MS Office XP (2002) MSWord the list of disabled documents is kept as randomly named binary values under the key: [HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Word\Resiliency\DisabledItems]
So deleting the values under the "DisabledItems" key for every user probably will do the trick.
Is there something more to it? I don't know - yet.