Hello there, from the research I have done, I believe your issue is related to permissions in accessing the registry keys. Follow these steps to correct your permissions in the registry.
1. Log on to the computer by using an Administrator user account.
2. Click Start > Run > type regedit, click OK.
3. Locate and then right-click the following registry subkey.
HKEY_LOCAL_MACHINE\Software\Microsoft\Office\12.0
4. Click Permissions.
5. Click Users (Computer_name\Users), and then click to select the Allow check box for the Full Control permission.
6. Click OK, and then quit Registry Editor.
7. Start an Office program. Wait for the configurating finished. Restart the application. What is the result?
Hope this helps,