I'm not familiar with that particular mouse, but the problem sounds like a failing or sticky microswitch inside the mouse. It's apparently getting 2 contacts for every one you want. As for a solution... get a new one. If still under warranty, get gateway to send a new one, if not, Logitech and microsoft make good mice, among others. $20-50 dollars is reasonable for a wheel mouse. Glen Sagers > The mouse that came with my two-year-old Gateway PC is misbehaving. One > left click will often make the screen advance two pages instead of one. > This happens irregularly, perhaps every 5 to 10 clicks. > > It has two buttons and a central scroll knob. It's labelled "MODEL: MOSXK". > > Can anyone tell me the cause of the problem and suggest a cure? > > Bob Edsall The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com