The domain member that runs the RPC contacts the primary domain controller (PDC). This update addresses an issue that affects remote procedure calls (RPC) to the Win32_User or Win32_Group WMI class. This update supports daylight saving time (DST) changes in Israel. This security update includes quality improvements. This update addresses security issues for your Windows operating system. For an overview of Windows 10, version 1607, see its update history page. For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types.