Windows Defender

I have Norton IS 2014 running on Windows 8.1. After the last NIS update, I get many of the following messages in my event log:

 

"The Windows Security Center Service could not stop Windows Defender."

 

I checked, and the windows defender service is not running and its startup is set to manual.

 

Does Symantec or anyone know what the resolution to this issue is.

 

Thanks,

 

Bill Byrnes