Are you trying to install or use Microsoft Office, but are you getting the error message 'product key error'?
On this page, you will find more information about the most common causes and most relevant solutions for the Microsoft Office error 'product key error'. Do you need help straight away? Visit our support page.
We've created a list of solutions which you can follow if you want to solve this Microsoft Office problem yourself. Do you need more help? Visit our support page if you need professional support with Microsoft Office right away.