The wireless mouse worked really well on the home pc using WindowsXP – I’m not as impressed with it on the office pc, using Windows 2000 on a wood grain effect wooden desk. The mouse constantly jitters around all the time – I guess the grain is effecting the mouse. I don’t think I have the shakes! Put the mouse on a mousemat, and it works really well though – but I thought the point of an optical mouse was that you didn’t need a mousemat!