We're not out of tricks yet
In windows explorer, navigate to
C:\Program Files\Alwil Software\Avast4
in the right hand panel locate ashdisp.exe
right click the file and select send to, chose Desktop(create shortcut)
This will place a shortcut on your desktop, you will have to click it each time you start your computer to display the icon.
You can also add it, the shortcut, to your startup folder. It will then start with windows. Just move the shortcut to
C:\Documents and Settings\ your user \Start Menu\Startup