Yeah I think your right but it was Outlook I was having problems with.

Also I had other problems when 2007 was installed and tried to install a later version. Once activated it kept prompting me to activate. When I selected to activate and enter the activation code it then told me that I had used that activation code the max. number of times.

At the time I didn't have a phone near the computer so could not call ms. So returned the product for a refund.

So I don't know, If your not a developer I think perhaps it's better to uninstall any previous copies of MS Office when installing a new version.

Some people recommend this, i.e. first uninstall any installations. I'm not certain why one would want to run multiple versions however it maybe possible but potentially can cause problems.