December 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials

Important When you install this update (3013769) from Windows Update, update 3004545 is included in the installation.

The December 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 resolves issues and includes performance and reliability improvements. We recommend that you apply this update rollup as part of your regular maintenance routines. Check out the fixed issues in this update. Also notice that there is a prerequisite and a restart requirement for installing this update.

Issues that this update resolves

This update package fixes the problems that are documented in the following Microsoft Knowledge Base articles.

How to obtain the update rollup

Method 1: Windows Update

This update is provided as an Optional update from Windows Update.

For more information about Windows Update, see frequently asked questions on Windows Update.

Method 2: Microsoft Download Center

You can also obtain the stand-alone update package through the Microsoft Download Center.

Download Download the x86-based Windows 8.1 update package now.
Download Download the x64-based Windows 8.1 update package now.
Download Download the x64-based Windows Server 2012 R2 update package now.

Note The update for Windows RT 8.1 can be obtained 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


To apply this update, you must first install update 2919355 on Windows 8.1 or Windows Server 2012 R2.

Restart information

You must restart the computer after you apply this update.

Update replacement information

This update does not replace any previously released update.

File information

File detail information
For a list of the files that are provided in this update 3013769, download the file information for update 3013769.

File hash information
The following table lists the thumbprints of the certificates that are used to sign the updates (.msu). Verify the certificate thumbprint in this Microsoft Knowledge Base article against the certificate thumbprint indicated on the update that you download.

File nameSHA1 and SHA2
Windows8.1-KB3013769-arm.msuSHA1: 216740D6C014508D4454C6D6CE69E8F278813BB1
SHA256: F9E04FA21E44CA6F2521FF6BC5FFA10E4FF49A1ACBAD6F02DCE46FA689971378
Windows8.1-KB3013769-x64.msuSHA1: 333FD115B90E8AD6D8111723AC03AEBD8A9D91FB
SHA256: AFF4E6CD1A7999DD562E6F0C00CA14DAC76B68EB1BAB2718391FDE4AB2502780
Windows8.1-KB3013769-x86.msuSHA1: 8ABC5EEC07AD26C155F3BF6958A430DFAAE2D6D4
SHA256: 1E4F62620DFB2CCC2ED3C69D894D7780DE11C0AC2B713B8931C668BAA27D4C8B
Windows8.1-KB3004545-arm.msuSHA1: 6D9E2D181F3A7FFABC29191397AB7A64DB9B91DC
SHA256: 82A3C5CF1E768BE44B33BCE777BDEBB1970E435E441B50A6C58CFD8C4FE01EB0
Windows8.1-KB3004545-x64.msuSHA1: 462CE6DBCF30B8907BF1F742961661BA1B4A6412
SHA256: 4CFFDE8DEA363DD3FAA1885E8F784E180C1FF102E36267B3686CA0C01789E5E0
Windows8.1-KB3004545-x86.msuSHA1: 1977CBA1F42E52A0F17A3C468F222B3C3509017D
SHA256: 3F20FB9196590D89CC38FDE00E0ADA9F95A1ECA1F836DECCFE95E19AF87FD7ED


See the terminology that Microsoft uses to describe software updates.