wuloader.exe is a process checking for the latest updates for Windows. The process automatically connects to an online location on a predefined schedule. This process has to is not set to run on default.
Non-system processes like wuloader.exe 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