hpbf001h.dll is a HPBF001H
belonging to HP LaserJet 4050 Series PCL 5e
from Hewlett-Packard Company
Non-system processes like hpbf001h.dll 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.