If any users have a 32 - Bit Windows PC they will need to install the older office addon which can be emailed to them.

Please see the below link from Microsoft to check if your pc is a 32-Bit or 64-Bit pc:

http://windows.microsoft.com/en-au/windows/32-bit-and-64-bit-windows#1TC=windows-7

If your Pc is a 32-bit windows pc you will receive an error message when trying to install the newest iinsight office addon in iinsight similar to the below:

Once the older addon is installed your problem will be resolved.