Symptoms
When you open a Microsoft Silverlight app on a Windows 8.1-based device, you may encounter permission issues on some Silverlight features, such as the hardware acceleration feature.
Resolution
Update information
To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update. Notes
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This update was first included in the following security update:
2909921 MS14-010: Cumulative security update for Internet Explorer: February 11, 2014
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For technical information about the most recent cumulative security update for Internet Explorer, go to the following Microsoft website:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
See the terminology that Microsoft uses to describe software updates.