dadtray.exe is a piece of software produced by Dell corporation which allows configuration options for your Dell laptops additional keys. Without this process these additional keys e.g. volume and the Internet key, will not work. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like dadtray.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