Lisa,
It sounds like you downloaded the Office Professional Edition 2003 Trial
Software.
The Microsft website shows:
"Office Professional Edition 2003 Trial software enables you to evaluate the
product on your system before making a purchase decision. Trial versions
contain all the functionality of the regular version, but can only be used
for 30 days.
When the 30 day trial period expires, the product will go into reduced
functionality mode. After the trial period expiration occurs, you can convert
the trial software into perpetual use without removing or reinstalling
software on your computer.
Simply obtain the product at any retailer and enter the valid product key
when prompted during setup."
Santara