Consider the following scenario. You have a Serviced Component complied for any CPU type, and you use a 64-bit installer to register it on a 64-bit version of Microsoft Windows. When you try to export this application you will produce an MSI file which can only be installed on another 64-bit system. If you then run the MSI on a 32-bit Windows client, you will receive an error message similar to the following:
This installation package is not supported by this processor type