avast is a resident AV application so you shouldn’t need to click on the avast icon on the desktop, it should already be running with an avast icon in the system tray.
What exactly are you trying to do, “but later in the day i want to go into avast” ?
That icon on the desktop is normally used to start avast from safe mode (run the memory check and open the Simple/Enhanced User Interface) as avast doesn’t start in safe mode.