dadapp.exe is a process belonging to Dell AccessDirect Applet.
Implements the Dell programmable keys on your Dell laptop. Also installs an icon on your system tray (DadTray). "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like dadapp.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.