newdot.exe is associated with an application that ads a toolbar to your browser that gives you access to their search system. It also ads adwares to your system. This process should be removed to ensure your personal privacy.
Non-system processes like newdot.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