Hi Ben31,
Thank you for reaching out to Microsoft Q&A Forum about the difficulties you’re facing while upgrading from Office Home to Office Professional. I understand how frustrating it is when some applications reflect the upgraded version while others, like Excel, remain tied to the previous installation.
This situation often occurs when remnants of the older Office installation remain on your system. To resolve this, I recommend the following steps:
- Use the Microsoft Support and Recovery Assistant (SaRA) tool to completely remove all traces of Office. This tool is more thorough than a standard uninstall.
- Restart your computer after the removal process.
- Reinstall Office Professional using your product key or the Microsoft account associated with your purchase.
After a clean removal and reinstall, all applications, including Excel, should align with the Office Professional version. Please also ensure that Windows and Office updates are applied once the installation is complete.
If things still don’t work out, feel free to share an update, I’ll be happy to assist further.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.