On December 9 Microsoft released Silverlight version 5.1.31010.
This version has been pulled and replaced with 5.1.30514.
If you experience errors when trying to view DRM protected videos on sites like Netflix, Amazon Prime, or Sky, please check to see if you have Silverlight version 5.1.31010 installed and if so, uninstall and reinstall Silverlight.
1.Control Panel > Programs > Uninstall a Program
2.Select Microsoft Silverlight
Install the previous version of Silverlight
2.Click "Click to Install"
3.Run the file
Silverlight_x64.exe for 64-bit OS
Silverlight_x86.exe for 32-bit OS)