Microsoft silverfast 5.1.31010.0 (KB3011970) breaks streaming for Amzon, Netfix and other streaming services which use silverlight

After installing KB3011970 from Microsoft maintenance on 12-09-2014, every streaming service which used digital rights failed under windows 7 (ultimate).  This is true when using FireFox or IE11 or any other browser that utilizes Silverlight.  This occurred on three of my computers prior to discovering the failure.  I stopped and investigated. 

KB3011970 apparently installed version 5.1.31010.0 and stores the HDS data in directory program data\playreadysilverlight.  Previous versions utilized the directory program data\playready.  Testing with Amazon, Netflix and other streaming services showed a disconnect in the code.  The services could not reconcile the digital rights.  Error codes are specific to the streaming site but include 6001 for amazon and N8152 for Netflix.

Programs which I deployed which use silverfast also fail with digital rights because of the change in KB3011970. 

After chasing the problem for many hours and talking to Microsoft (who wanted to charge for figuring out their problem), tweaking the registry and directories, uninstalling and reinstalling various components the only solution at this point is to uninstall KB3011970 or manually uninstall Silverlight and install version V5.1.30514.0 

If anyone else has a suggestion, I will be happy to test.

Microsoft has removed KB3011970 from update as of December 10.  They have also restored version 5.1.30514.0 as the download from the Microsoft Silverlight home page  There are several reports of the problems with KB3011970 with the recommendation that you download the V5.1.30514.0, uninstall Silverlight V5.1.31010.0 and install the older version. 


I am still having issues even with this version.  What use to work (for example, Time Warner Cable TV) still does not work.  HELP!!!!!!!!!!!!!!!!!!

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Last updated March 20, 2018 Views 964 Applies to: