nvcpldaemon (NvQTwk.dll) is a module related to NVIDIA graphics cards. It is an essential module for the operation of such graphics cards so it should not be removed.
Non-system processes like nvcpldaemon originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues