Here's a nugget from the Microsoft Support Site... 

How and when to contact Microsoft Customer Service

For information about replacement manuals, disks, drivers and service packs, product orders, policies related to copying software on additional computers, licensing, and product registration, Microsoft Customer Service is available Monday through Friday, from 6:30 A.M. to 5:30 P.M. Pacific time. To contact Microsoft Customer Service, call (800) 426-9400.

To register your product and to find information about product registration issues, visit the following Microsoft Web site:

Article ID : 295539 Last Review : June 28, 2005 Revision : 4.0
This article was previously published under Q295539