Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Usually this issue occurs due to multiple instances of Office installed in the computer.
Click on Start > Control Panel > Programs and Features > Search for all the Microsoft Office applications listed. Uninstall the Microsoft Office applications in the list including 2007 Microsoft Office System (trial).
If uninstall fails using Programs and Features then Download and save the Fix-It tool from the link below:
http://support.microsoft.com/kb/971179
Right click the Fix-It file and run as administrator
(NOTE: Fix-It works only in a 32-bit operating system.)
To check the type of the operating system click on Start > Right-click Computer > select Properties
NOTE: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. It is strongly recommended that you back up the registry before you modify it. For more information about how to back up and restore the registry, click the following link: http://windows.microsoft.com/en-us/windows7/Back-up-the-registry
Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk
To remove Office 2007 in a 64-bit operating system follow the steps in the link below:
http://support.microsoft.com/kb/928218
Once Office 2007 trial is removed, install Office 2007 Ultimate using the disc. For more help on installing Office 2003 check the link below:
http://support.microsoft.com/kb/821593
Aravind, Microsoft Answers Support Engineer.
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