THX!
You gave me a hint... I installed avast! again and the problem was the custom installation and the menu. I thought the whole time, that when I uncheck the Box directly under "The Bat" I will deactivate "The Bat"-support - but it was the standard guard.... Very confusing the installation-menu!
But now everything is working and I have to learn the program and to set it up correctly - hope it will not be too taff?
THX again for the hint - I'm really happy now! What about in comparison to Nod32 - is avast! as good as Nod32? What do you think?