Action Center is a central place to view alerts and take actions that can help keep Windows running smoothly.Action Center lists important messages about security and maintenance settings that need your attention. Red items in Action Center are labeled Important, and indicate significant issues that should be addressed soon, such as an outdated antivirus program that needs updating. Below will tell you how to turn off/on notifications from action center.
First open your Control Panel,then click Action Center:
Now in the Action Center windows select Change Action Center settings.then you can turn on /off聽 about windows update ,virus protection,spyware , related protection and so on.