nvvsvc.exe is a NVSVC belonging to NVIDIA Driver Helper Service, Version 174.53 from NVIDIA Corporation. This process is associated with Nvidia and is known as Nvidia Driver Helper Service or Nvidia Display Driver Service. If this process is stopped, it will stop the Nvidia Control Panel from showing in the Control Panel and also from the desktop context menu.
Non-system processes like nvvsvc.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