Hi Harry,

Thanks for the prompt response.

>>You don't identify the make and model of the mouse or the computer; that information could be helpful.

Well, the mouse is just a 'generic' optical mouse.

>>If there is a small slide switch on the bottom of the mouse, try it in the other position.

No dice (or switch) unfortunately.

>>Try a different mouse.

Not possible at this very minute - but I could buy an non-optical ps2 mouse as a spare I guess.

>>Lead a better life, this could be a karma thing.

Sainthood has alluded me thus far for some reason, so I had thought of the karma angle

>>Look in your system's BIOS for any mouse related settings.

What sort of thing should I be looking for?

Best,
Tim