It is imperative that this particular update be installed to continue recieving (Security Patches/Fixes) for Windows 7 SP1, to include Internet Explorer 11.
The Microsoft advanced Bulletin explains it more in depth HERE
Please view your "Update History" for April,2014 and make certain this update is installed.
Additional information on this Update can be found Here,http://support.microsoft.com/kb/2929437
Remember this has to be installed, for tomorrow is "Update Tuesday".
I even ran a (sfc/scannow) in Command Prompt, to verify the integrity of my installed Updates.
Message was edited by: catdaddy on 7/7/14 9:18:00 PM EDT