DISCLAIMER: This thread is currently "under construction", and will be edited for the remainder of today. Please excuse any blank spaces or crossed-out "placeholders" for items expected to be announced.
Today is Microsoft Tuesday --- the SECOND Tuesday of the month --- on which Microsoft is expected to release its monthly cycle of Windows critical/security updates. Based on previous history, they should become available at 1 P.M. [USA - Eastern Standard Time]
Please use Windows/Automatic Updates to determine which updates are applicable to your particular system.
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Please note that Microsoft has recently separated-out OFFICE NON-security updates (i.e. bug fixes, or enhancements for modified features) to have a day of its own, the FIRST Tuesday of the month (i.e., last week)... so that should cut-down on the totality of new security updates offered today.
http://windowsitpro.com/microsoft-office/microsoft-adds-patch-day-regular-monthly-update-schedule-office-products
http://windowsitpro.com/microsoft-office/welcome-microsoft-office-patch-tuesday-may-2016