I am running PE 8.4 on a vm and this seems to be working fine, pzStandardProcessor is running. I can confirm that port 9092 needs to be open for localhost access.
One guess is that it might be antivirus running on your system that is blocking this. Maybe you can try to exclude C:\PRPCPersonalEdition\jre1.8.0_121\bin\java.exe from the local antivirus protection policy settings.
Also check the local Windows Firewall and open port 9092 if possible, or completely exclude the java.exe from the Windows firewall policy