I have Word for Windows 95 version 7.0. I am using it on my current
XP Home SP3 system, and it works fine, except that the mouse scroll
wheel doesn't work in Word. It works fine in all other apps. Any
suggestions?

It is a Labtec mouse. Device Manager says:
PS/2 Compatible Mouse
This device is working properly
Driver Provider: Microsoft
Driver Date: 01/07/2001
Driver Version: 5.1.2600.0

(I know there are more recent versions of Word, but I'm a skinflint. I
was using Open Office for a while, but find it slower and more clunky
than Word, though it is handy for opening files from more recent
versions of Word that my elderly version doesn't like.)

With thanks
Pensive Hamster