hpqthb08.exe improves the time HP Image Zone takes to load. If you disable the process, HP Image Zone takes longer to start. Disabling or enabling it is down to user preference.
Non-system processes like hpqthb08.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