After receiving a new computer, with Windows Vista pre-installed, you may notice that there is a Trial version of Office 2007 installed.

So you want to run Office 2003?  Not a problem.

Uninstall Office 2007 from the computer, and also uninstall the "Business Contact Manager Outlook 2007". Then instal Office 2003 with your valid license keys.

If you forget to remove the "Business Contact Manager Outlook 2007" software, every time you open Office (Word, Excel, Outlook or Powerpoint), a dialog box 'BCM Office Addin' with the message 'Office Application Version does not match'.