NVIDIA Network Access Manager is part of the NVIDIA Firewall used on certain Asus motherboards. This process should not be removed to ensure that your system is secure.
Non-system processes like nsvcappflt.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues