Following is the procedure to disabling the action center completely:
- Open Action Center from the Control Panel.
- Click change Action Center settings on the left.
- Uncheck all of the checkboxes and hit OK.
- Go to Start > Run > services.msc
- Scroll down to Security Center, right click > properties and stop the service.
- Change the startup type to Disabled. Hit OK and close the window.
- Go to Start > Run > gpedit.msc
- Browse to User Configuration > Administrative Templates > Start Menu and Taskbar
- Find the entry for 'Remove the Action Center Icon', right click > edit, and set it to enabled. Hit OK.
- Restart PC.