office prompting for ZF561402.CAB

One of the laptops was prompting for ZF561402.CAB whenever one of the office apps was opened. The only thing that had changed was some sort of installation of frontpage2000 (for some unknown reason).
We were getting prompted for the office2003 cd, but when you put the disk in the drive it would still ask for the cd. Eventually solved it by putting a different copy of office2003 in the drive. Not sure what the difference is, but I know that the original cd used is the volume licence copy, yet I don't think the cd required was the volume licence key one.