Maybe your daughter has a trial version of Office 2003, and the
trial period has ended.  Or maybe your daughter has not activated
her Office software.

What happens if your daughter starts Word and clicks on Help |
Activate Product?  If she is already activated, a dialog box
saying so will appear.  If she is not activated, the Activation
Wizard will start (she should choose the telephone activation
method if she doesn't have internet access).  If she has an
expired trial version, a dialog box will prompt her to enter a
valid product key or convert (purchase a key) online.