By default, the Action Center icon will be displayed in the taskbar and display messages about security and management settings.
While in Action Center you can see whether the settings are enabled or not and change it by clicking on different links.
Click the Change Action Center setting to turn the message on or off.
If you are an experienced user and do not need to look at the Action Center icon in the taskbar, you can disable it. Click on the Start bar and go to Control Panel .
Now in Control Panel select All Control Panel Items and then click on System Icons .
The Turn system icons on or off window will open and here you will change the Action Center to the Off state. Note that you can also turn off or turn on other system icons.
Also if you click on Customize notification icons in the screen above you can choose to customize other system tray notifications at your disposal.
If you're new to Windows 7, you probably don't want to disable the Action Center completely until you feel better about it. With this tip, you can completely control the number of notifications that appear.