About this update
This update turns on the setting that disables SSL 3.0 fallback in Internet Explorer 11. Internet Explorer 11 will now block the connections to websites that fall back from TLS 1.0 or a later version to SSL 3.0 or an earlier version. By default, this update turns on this setting only for protected mode sites in Internet Explorer 11. By default, Internet sites and restricted sites run under protected mode in Internet Explorer 11. This setting can be configured for all sites, protected mode sites, or no sites (not recommended). You can make this configuration through Group Policy, the registry, or a one-click Fix it solution.
For more information about how to configure this setting, see the configuration steps in the "About this update" section of the following Microsoft Knowledge Base article:
To enable this update, install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update. Additionally, see the technical information about the most recent cumulative security update for Internet Explorer.
Note This update was first included in security update February cumulative security update for Internet Explorer (MS15-009).
See the terminology that Microsoft uses to describe software updates.