Are you receiving an invalid product key error in Microsoft Office 2010?
If you see this error message after entering your product key, start the Online Solution Wizard.
This is not a valid Office Product key. See above examples to learn more.
Run the Online Solution Wizard for a step-by-step solution is available to resolve this problem.
Are you receiving an invalid product key error in an earlier version of Microsoft Office?
If you are looking for information on validation errors in an earlier version of Microsoft Office, click to view the following article in the Microsoft Knowledge Base:
Invalid product key errors in Microsoft Office 2007 or 2003
In 2007 Microsoft Office
Error : The key is incorrect. Verify that you have the correct key, and then retype it.
In Microsoft Office 2003
Error : You have not entered a valid Product Key.
Please check the number located on the sticker on the back of the CD case or on your Certificate of Authenticity.Check for detailed step by step office setup
process or visit www.office.com/setup
for new office download.