How to solve the error code 25004: The product key cannot be used on this machine

There are a few possible solutions to this error code:

1. Check if you are using the correct product key for your version of Microsoft Office. Make sure that the product key matches the version and edition of Office that you are trying to install.
2. Uninstall any previous versions of Microsoft Office that may be conflicting with the installation. Use the Microsoft Office Removal Tool to completely remove any previous versions of Office.
3. Disable any antivirus or firewall software temporarily during the installation process. Sometimes, these security programs can interfere with the installation process and cause errors.
4. Try activating the product key online instead of using the phone activation method. This can sometimes resolve activation issues.