tkbellexe is a process belonging to RealOne Player. This process works as a Scheduler for RealOne Player.
This is a non-essential process so disabling or enabling it is down to user preference.
Non-system processes like tkbellexe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues