Hey guy, I got this weird problem with the pen. the pen is working 100% fine while i was using one note, I hooked the power to the sp3 and the pen became buggy and the screen can not detect it especially when I rest my palm on the screen. I restarted the device and it updated the firmware 7/8/2014 im not sure if the problem existed before the update but i think it didnt. i tried restarting several times, I also tried a hard reboot with no luck. one more thing to mention i used the high performance method by entering " Powercfg -setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c" in cmd and the screen brightness kept increasing and decreasing every few seconds. this setting is gone when i rebooted the device. what kind of problem this? I hope its not a hardware thing I dont want to ship it back to the US Anybody got this problem? or have any idea of whats going on?