When I connect the productivity jacket a red light on the jacket starts to flash, this is whilst in Windows. I have not tried it outside Windows. How do I turn off this light? The battery on the jacket does charge when not connected to the tablet, I believe it does also charge when connected to the tablet. The proprietary USB port on the tablet works fine with peripherals, and the tablet charges without problems. Is there software available to control the tablet? I just now connected the jacket to the tablet and a message in the bottom right of screen popped up. 'This device is not a HP designed device' - I clicked on the message, but nothing happened after it disappeared. I looked at Device Manager whilst the jacket was connected, but no errors. Device Manager - I uninstalled/ USB Root Hub (xHCI) - scanned for device changes - nothing new appeared. Windows does show the secondary battery is at 52 percent. And primary battery is showing the expected power.