Today is "Patch 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 PM [USA - Eastern Daylight Saving Time].  

Please use Windows (or Automatic) Updates to determine precisely which updates are applicable to your particular system.

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Furthermore, Adobe has announced that it will be releasing its quarterly update for Adobe Reader later today.