Microsoft Windows Update problem with Powerpoint 2007 KB982158

I'm posting this as it was a rather odd solution to a rather odd problem!

A user has a Windows XP system with Office 2003 installed.

Automatic Updates were set to run in the background.

However, their computer was displaying an error message when installing the Powerpoint 2007 KB982158 update (even though they hadn't got Office 2007 installed).

All the usual tricks (such as deleting the WIndows Update directories and trying to install it manually) didn't work.

The solution

Download and install the Office 2007 Compatibility Pack from Microsoft. This allows Office 2003 to open Office 2007 files. Once this was installed, it also allowed KB982158 to run without a problem!