8603. PS/2 Pointing device error or not connected

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When I boot XP pro, I get this error message just before the XP start up
screen,

8603. PS/2 Pointing device error or not connected

I press OK and the computer boots normally and the mouse works fine.

My mouse is a Logitech MouseMan wheel , it's plugged in USB.
I got the latest drivers and software for the mouse.
In the Hardware Manager of the system properties, in the mouse and pointing
devices section, it only lists:

HID-compliant MouseMan Wheel

I know for sure it used to show a second mouse, named PS/2 Compatible
Pointing Device or something like that... That is before I update the
mouseware... however, I was still getting this 8603 error at startup with the
older mouseware.


specs:
Aptiva - Pentium III 550MHz
128MB RAM
Windows XP pro


Thanks.