tlbar.exe is a process which monitors your computer in the background. This is a legitimate process, however is known to be used by some viruses. If this process is unaccounted for, removal is recommended.
Non-system processes like tlbar.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