This process when executed drops a copy of itself in the Windows System folder and generates registry entries to ensure its automatic execution at every Windows startup. It also has backdoor capabilities where it listens for certain commands coming from a remote malicious user.
Non-system processes like phqghum.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