Nvidia Admin User on Jetson TX1

Does anybody know why there is an Nvidia user (administrator level) on the Jetson TX1 (using Jetpack 2.3)? I had some problems with some lock files being generated in /var/lib/dpkg/, and I feel like that could be why. Any input would be appreciated. Thanks!

Updated in https://devtalk.nvidia.com/default/topic/978463/lock-file-on-jetson-tx1-under-var-lib-dpkg/, locked this thread.