winhlp32.exe is the Microsoft Windows Help File viewer. this process opens files, on user request relating to the said subject. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like winhlp32.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