You do not ordinarily need the office disk when you run a Repair (see under Help|Detect & Repair). You can also run a 'repair' installation via 'Add/remove programs' in the Windows Control Panel.

BTW, your lack of an Office disk raises the question of whether you actually have a valid license for the copy you've been using.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]