Network Printer Control (NPC) is designed to improve the management of default printers in Windows 8 and 10. The idea came to the author when upgrading a laptop from Windows 7 to 10. Specifically, Windows 10 wiped out the default printers for each network that were stored. In Windows 7, you had a clear path to manage your default printers; Windows 10 added 'Let Windows Manage My Default Printer' — this switches the default printer it associates with a given network to the last printer used on that network instead of keeping the same default even if you occasionally use another printer. So, if you use a specific printer most of the time when on a specific network, you probably want that one to be the default all of the time. But under the new Windows 8/10 scheme, when you need to use another printer, the mere act of using that other printer effectively changes the default printer associated with that network.