I have my friend's computer here which is having a weird problem with the mouse. it is a Celeron 1GHz on Chaintech 6OIV2 board running WinXP Professional. the problem is that the mouse sometimes freezes suddenly. when I unplug the mouse and plug it in again, it works fine for a while, then it happens again. the mouse is some generic PS/2 optical browser mouse. the other PS/2 port has Logitech iTouch keyboard plugged in. the problem goes away when using an USB keyboard. the mouse itself is OK, it works fine on my computer together with a PS/2 keyboard. is there a solution?