I've had my Surface Pro for over a year now and the pen has stopped working. I don't use it that often so I'm not entirely sure if this is perhaps due to the Win 10 upgrade or not. I've tried uninstalling all mouse/pointer device drivers and restarting. I've also tried manually installing Wacom's drivers, though maybe I got the wrong ones... The pen doesn't have batteries does it? Does anyone have any suggestions? I don't really use the pen that often but I'm upgrading to either the Surface Pro 4 or the Surface Book and would like to give my Pro 1 to someone in full working condition. Thanks in advance!