qlbctrl.exe is a QLB Controller from Hewlett-Packard Development Company, L.P. belonging to HP Quick Launch Buttons.
It is an essential process if the programme is to operate properly so it should not be removed.
Non-system processes like qlbctrl.exe 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