Should I install this update?
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This update was released on December 12, 2014 and offers a new build (version 5.1.31211.0) of Microsoft Silverlight for users of recalled version 5.1.31010.0. For more information about Silverlight, go to the What is Silverlight? section.
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This update is included in current Silverlight installers. If you do not have Silverlight installed, the update will be offered to you on compatible systems by Microsoft Update.
If you do not want to install this update, go to the How to hide this update so that it does not appear again section.
Improvements in this update
Fixes an issue that generated errors when you tried to play Microsoft PlayReady Digital Rights Management (DRM) content in Silverlight version 5.1.31010.0.
How to obtain this update
This update is available from the following sources.
Microsoft Update
This update is available from Microsoft Update. If you have an earlier version of Silverlight installed, this update will be offered as "Update for Microsoft Silverlight (KB3011970)."
Silverlight update information
Restart requirement
You do not have to restart the computer after you apply this update.Note If you have had an earlier version of Silverlight installed, or if you are using Mozilla Firefox, you must restart your browser.
Windows 8.1
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Swipe in from the right edge of the screen, and then tap Search. Or, if you are using a mouse, point to the lower-right corner of the screen, and then click Search.
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In the search box, type Windows Update.
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Click Check for updates.
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After the scan for updates is completed, click the optional update link.
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In the Select updates to install section, right-click the update that you want to hide, and then click Hide update.
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Click OK.
Windows 8
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Swipe in from the right edge of the screen, and then tap Search. Or, if you are using a mouse, point to the lower-right corner of the screen, and then click Search.
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Tap or click Settings.
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In the search box, type Windows Update, and then click Install optional updates.
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Click Check for updates.
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After the scan for updates is completed, click the optional update link.
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In the Select updates to install section, right-click the update that you want to hide, and then click Hide update.
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Click OK.
Windows Vista and Windows 7
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Click Start, point to All Programs, and then click Windows Update.
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Click Check for updates.
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After the scan for updates is completed, click the optional update link.
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In the Select the updates you want to install section, right-click the update that you want to hide, and then click Hide update.
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Click OK.
How to verify whether Silverlight is installedVerify your installation by visiting the Silverlight installation page.
More Information
Microsoft Silverlight is a powerful tool for creating and delivering rich Internet applications and media experiences on a website. Silverlight is a free plug-in that is compatible with multiple browsers, devices, and operating systems. It has features and purposes that are similar to those of Adobe Flash.
For more information about Silverlight, go to the following Microsoft websites:
Silverlight administration Microsoft Silverlight Silverlight developer resources
References
For more information about the Silverlight version 5.1.31211.0, go to the following article in the Microsoft Knowledge Base:
3025055 New Silverlight version is available to replace version 5.1.31010.0
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
