Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Michael Cron
Welcome to Microsoft Q&A forum and thank you for your question.
I understand how frustrating this is, especially with an older version like Office 2010.
Unfortunately, Office 2010 cannot be installed or activated without a valid product key. Microsoft does not provide replacement keys if the original one is lost.
There are still a few options that you can try, such as:
- Recover the key from a computer where Office 2010 is still installed, if you still have access to that device.
- Check your original proof of purchase (email receipt, product card, or box).
- If neither is available, the only supported path forward is to purchase a newer version of Office or switch to Microsoft 365.
Office 2010 is not supported anymore, please refer to End of support for Office 2010 .
Thank you for your understanding.