I bought this mouse directly from HP and I too found my carpel tunnel slip away. Months later though as the mouse began to make its own movements it forced my hand to open up the On Screen Keyboard and began communing with the dead. For nearly a week I was forced to channel emails for the dead as undead energy glued the mouse to my hand and forced my body'd movements until my it became physically exhausted from the lack of carbohydrates and I lost consciousness. When I woke up after my liver was able to convert some of what little energy was left in my body to glucose I took the opportunity to unplug the possessed device and incinerate it. I'm using different mouse now and instead of carpel tunnel I now have late stage osteoarthritis. Apparently working my hand for so long caused severe joint damage.