Remove windows security alert red icon

Today, my computer went naked, and I unmounted it. Now, the windows security alarm icon pops up in the lower right corner of the taskbar, prompting "your computer may be at risk... click this balloon to fix the problem ",.

It is not beautiful, so find the method to clear the windows security alarm icon in the lower right corner of the taskbar.

Method 1
Control Panel-Security Center-(on the right side of the pop-up security center window) change how the security center notifies me-three check points in alarm settings are canceled.

Method 2
Click "start" --- Control Panel --- management tools --- Service, find "Security Center" in the service, double-click its properties, and stop the service first, then, change the Startup Type to "disabled. At this time, you will find that the method for notifying me by changing the security center has become gray.

Both methods can stop the windows security alarm icon. I personally think the first one is better. If the service item is stopped, it may cause other security problems.