No clue unless you're using a laptop mouse pad where you may have accidentally dragged the pointer over its 'hot' link. This is my first time using one and have already found out the hard way about this 'feature' numerous times and that the several different laptops I've tried all perform differently, especially WRT finger tap pressure and varying atmospheric effect on the skin/mouse pad surface, not to mention some sites have 'hot' links that need a proper mouse pad button/rocker switch to activate without having to 'hammer' it with my finger[s]. Also, my left index finger has no fingerprint and won't work except when 'hammering' the pad, so overall enough aggravation for me to warrant getting a wifi mouse next time they come on sale at BB, etc..

GM