jlahoda [Mon, 13 Jun 2016 11:46:07 +0200] rev 38887
8139507: WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs
Summary: Making Preferences.systemRoot/userRoot lazy on Windows, to avoid warnings for system root when only user root was requested; reducing synchronization while creating the Preferences.
Reviewed-by: alanb