FULL PRODUCT VERSION :
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.14393]

A DESCRIPTION OF THE PROBLEM :
When using Preferences API to store preferences for all users.
Preferences prefs = Preferences.systemRoot().node("com/example/application");
Calling prefs.put(...) puts the value somewhere in HKEY_LOCAL_MACHINE. But when calling prefs.get(..) it is searching for the value somewhere in HKEY_USERS.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
allUsersPreferences.put(preferencesKey, "value"); should put the value under HKEY_USERS/S-1-5-21-2949271145-287329799-4077743999-1001/SOFTWARE/JavaSoft/Prefs/com/example/application
ACTUAL -
allUsersPreferences.put(preferencesKey, "value"); is putting the value under HKEY_LOCAL_MACHINE/SOFTWARE/JavaSoft/Prefs/com/example/application

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences <init>
WARNING: Could not create windows registry node Software\JavaSoft\Prefs\com at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences WindowsRegOpenKey1
WARNING: Trying to recreate Windows registry node Software\JavaSoft\Prefs\com at root 0x80000002.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences openKey
WARNING: Could not open windows registry node Software\JavaSoft\Prefs\com at root 0x80000002. Windows RegOpenKey(...) returned error code 2.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences WindowsRegOpenKey1
WARNING: Trying to recreate Windows registry node Software\JavaSoft\Prefs\com\example at root 0x80000002.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences openKey
WARNING: Could not open windows registry node Software\JavaSoft\Prefs\com\example at root 0x80000002. Windows RegOpenKey(...) returned error code 2.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences WindowsRegOpenKey1
WARNING: Trying to recreate Windows registry node Software\JavaSoft\Prefs\com\example\application at root 0x80000002.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences openKey
WARNING: Could not open windows registry node Software\JavaSoft\Prefs\com\example\application at root 0x80000002. Windows RegOpenKey(...) returned error code 2.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences WindowsRegOpenKey1
WARNING: Trying to recreate Windows registry node Software\JavaSoft\Prefs\com\example\application at root 0x80000002.
Feb 13, 2017 11:17:50 AM java.util.prefs.WindowsPreferences openKey
WARNING: Could not open windows registry node Software\JavaSoft\Prefs\com\example\application at root 0x80000002. Windows RegOpenKey(...) returned error code 2.
notFound

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.prefs.Preferences;

public class PreferencesBugTest {
    public static void main(String[] args) {
        Preferences allUsersPreferences = Preferences.systemRoot().node("com/example/application");
        String preferencesKey = "key";

        //This is put under HKEY_LOCAL_MACHINE/SOFTWARE/JavaSoft/Prefs/com/example/application
        allUsersPreferences.put(preferencesKey, "value");

        //This get method is looking under HKEY_USERS/S-1-5-21-2949271145-287329799-4077743999-1001/SOFTWARE/JavaSoft/Prefs/com/example/application so it prints "notFound"
        System.out.println(allUsersPreferences.get(preferencesKey, "notFound"));
    }
}
---------- END SOURCE ----------

SUPPORT :
YES