MS16-046: Security update for secondary logon: April 12, 2016

Applies to: Windows 10Windows 10, version 1511


This security update resolves a vulnerability in Microsoft Windows. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-046.

More Information

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see
Get security updates automatically.

Note For Windows RT 8.1, this update is available through Windows Update only.