This article describes two issues that are addressed in this update: the cluster service fails when it's being shut down and data deduplication fails with the "This drive is locked by BitLocker Drive Encryption. You must unlock this drive from Control Panel" error message in Windows Server 2012 R2. Before you install this update, see the Prerequisites section.
Issus that are fixed in this update
Issue 1Critical error occurs when you shut down the cluster service. For example, the "[Shutdown] Groups failed to terminate in a timely manner. Cluster service will exit." error message is logged when you shut down the cluster service.
Issue 2Data deduplication doesn't work on a BitLocker-encrypted cluster shared volume (CSV) provisioned by using a tiered storage space. It fails even if the drive is unlocked, and the following error message is logged:
This drive is locked by BitLocker Drive Encryption. You must unlock this drive from Control Panel
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 UpdateThis update is provided as an Optional update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.
Method 2: Microsoft Update CatalogTo get the stand-alone package for this update, go to the Microsoft Update Catalog website.
Update detail information
PrerequisitesTo install this update, install April 2014, update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) in Windows Server 2012 R2.
Registry informationTo apply this update, you don't have to make any changes to the registry.
Restart requirementYou may have to restart the computer after you apply this update.
Update replacement informationThis update doesn't replace a previously released update.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.