Some versions of MX-P3 firmware have a bug where the camera will stop functioning after a computer reboot, or if the camera is plugged in before the computer is powered on. While this problem can be fixed by unplugging and plugging back in the ELMO, you can also update the camera's firmware to prevent the problem from happening at all. 

To request the update, please fill out an online support ticket - https://support.elmousa.com/portal/en/newticket