May 2016 DST update for Azerbaijan, Chile, Haiti, and Morocco in Windows

We recommend that you install DST updates on all computers, including both desktops and servers, for all users worldwide regardless of where the computers are physically located. The need for time zone information cannot always be anticipated, or its usage may not be obvious to the user. 

While it's important to keep time correctly on a computer’s local clock, consider also that many users interact regularly with users in other time zones through international phone calls and online meetings. Additionally, many Microsoft and third-party applications and services let users select their own time zone. Therefore, the servers that host those applications must have accurate time zone information.

Many other business scenarios also require accurate time zone information. These include coordinating travel itineraries, calculating hourly wages, and automating lighting and machinery. 

How to get this update

Important 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.

Method 1: Windows Update

This update is provided as an Important update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center.

Note The update for Windows RT 8.1 can be downloaded only from Windows Update.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information

Prerequisites

To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2. Or, install Service Pack 2 for Windows Vista and for Windows Server 2008.

Registry information

To apply this update, you don't have to make any changes to the registry.

Restart requirement

You don't have to restart the computer after you apply this update.

Update replacement information

This update doesn't replace a previously released update.