Step 1
Right-click on an empty spot on the system tray, which is the section on the far right side of your task bar, typically at the bottom of your desktop. Scroll up and select "Properties."
Step 2
Select "Customize" in the "Taskbar and Start Menu Properties" dialog box that appears.
Step 3
Browse through the list of current items in your task bar's system tray. Find "Windows Security Alerts." Left-click on it.
Step 4
Select "Always hide" the icon for Windows Security Alerts.
Step 5
Click the "OK" button at the bottom of the dialog box. Hit the "Apply" button in the "Taskbar and Start Menu Properties" window. Close all dialog boxes.