There are many well known pieces of Malware that target Microsoft Word Macros - hence they are turned off by default in recent versions of the software.
Following Yvonne's comment re. how to keep Malware off your systems we spoke to discuss how to clean up her system.
My recommendation was to flatten the system (as she has a copy of the data offline), format the disk, re-install Windows XP from the ground up, apply Service Pack 2, apply subsequent patches, re-install the applications, ensure that all Macro capabilities are disabled and then re-introduce the data.
If you know of a way for malware to travel within a Word document other than via Macros then please comment on this post.