You're not the only one! See
and one that I don't think is related:
My guess is that it might have something to do with:
- a previous installation of an earlier version of Office
- a trial version that has been installed earlier and expired
- possibly a language version problem
The only thing I can advise: uninstall everything related to Office using Microsofts own Windows Installer Cleanup utility (a free download from http://support.microsoft.com/kb/290301). Then reinstall your version.
If the problem persists and no help comes, I'd contact Microsoft. Their help for installation related problems like this might be free.
Best of luck.
When trying to launch the Thesaurus in any Office 2007 application, I am
receiving the following error message.
Microsoft Office Word can't open the thesaurus.
Microsoft Office Word cannot install the necessary files due to Windows
Installer error 1605.
The action is only valid for products that are currently installed.
Have already tried repair and uninstall/reinstall proofreading tools