Here is what I see on my Desktop Computer

Microsoft Office Standard Edition 2003
Installation Error; File not Found

A required installation file O0561401.CAB could not be found.

Original Installation Source Required
It says I need which ever installtion source that was used originally needs to be reinstalled.
However I do not have any original CD's as source nor do I know find it on my PC.
Anyone able to advice me to correct this issue?
Thank You

First, you need to pay attention to posting rules. You posted this in Forum Help ignoring the red warning to Read First. Forum Help is ONLY for questions about using this site so I've moved it.

Second, if your PC came preinstalled with Office 2003 from the manufacturer, you have to go back to them for support. If you bought it used, you should have gotten the disks. If you can't get the disks, then you will have to purchase a new package.