Office 2007 on Windows 8 activation problem

I recently got a comment from one of our readers having problems accessing Office 2007 after upgrading to Windows 8.

Doing some digging on the web, it seems that various users are having the same problem: They performed an upgrade to Windows 8 Pro or core edition and then suddenly they lost the ability to open Word, Excel, PowerPorint, etc., even after trying re-enter their valid product key, the software will respond with a message telling the user that the product key is invalid.

If you are having the same or related problem, you should consider picking up the phone and calling Microsoft Support and doing an activation by phone.

Key in mind the terms for the license:

Microsoft Office Activation Number:

Activate Microsoft Office 2007 programs

(See activation by phone) Older version of Office: Activation and registration of a Microsoft product

Invalid product key type errors occur in Microsoft Office 2007 or 2003

Phone Activation:

Activate by using the telephone You can telephone an Activation Center and activate your product with the help of a customer service representative.

For more information refer to this answer at Microsoft


About the author

Mauro Huculak is a Windows expert and the Editor-in-Chief who started Pureinfotech in 2010 as an independent online publication. He is also been a Windows Central contributor for nearly a decade. Mauro has over 12 years of experience writing comprehensive guides and creating professional videos about Windows, software, and related technologies, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and