The latest build update has changed the name on one of our PC's. On a Lenovo Carbon X that was already on Windows 10, received an update to 10586.29 . Once the update completed, we found the computers name had been changed and the domain no longer recognized it. It was named Rick-Carbon. After update it was BARBRIB-8E98MP8. I haven't yet found anyone else that experienced this. This PC is NOT enrolled in the insider program.