This message applies to people using Windows Media Center with a CableCARD tuner on Windows 7 only.
This update, labeled as "Update for Microsoft Windows (KB3004394)" has been found to break the PlayReady DRM system used by Windows Media Center to access protected content. Installing it will result in WMC displaying a message that a PlayReady update is needed. When attempting to update, the update fails.
If you have automatic updates enabled and have Windows Update set to install optional updates, this may be installed automatically on your PC.
To resolve the issue, uninstall the update. To do this:
1. Go into Control Panel
2. Select Uninstall a program
3. Click on View installed updates on the left
4. Locate Update for Microsoft Windows (KB3004394), click on it, and click Uninstall
5. Reboot
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