ahqtb.exe is the traybar process for your Creative soundcard. It gives you easy access to your soundcard settings. This process can be removed to free up system resources.
Non-system processes like ahqtb.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