Mx500 not performing.

I recently purchesed a mx500 of my mate, it was working fine at his lan but when i got home i encoutered some problems with it. It moves off by itself, feels
laggy,and just feels sluggish. I installed the drivers, they seem to do nothing. It works a bit better with a piece of paper under it but still does not fix it. Should i return it to my mate and try my luck with a mx510? or get a quality mouse pad?

thx

Firah

get a quality mousepad that can provide some consistency for the optical sensor to work with. you will see a big improvment then. using a peice of paper is not the way to go. the funcpad 1030 is a great pad.