What is nvbackend.exe and nvstreamsvc.exe processes running in background?

What are the mysterious nvbackend.exe and nvstreamsvc.exe processes that are running in the background on your system and how to remove them safely. You may try to delete the driver file but when you restart your computer you will still find that it doesn\'t delete. Even when you closed Nvidia in the tray it still keeps running. Here are simple ways to remove or uninstall these process and what they actually are explained.