When you install Office 2010, you'll be prompted to enter a 25-character product key that looks something like this:
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
The way you can find your product key depends on how you got Office. Select how you got Office from the options below.
Expand a section below to learn how to replace a lost Office 2010 product key.
Expand a section below to find product key information for other versions, troubleshooting help, and other useful information.
If you’ve followed the guidance in this article and still need help, visit our Microsoft support page for assistance.