realjbox.exe is a process belonging to the Real Jukebox which allows you to play your MP3 and music files. This is a non-essential process.
Disabling or enabling it is down to user preference.
Non-system processes like realjbox.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.