lalrecht,
refering to a 4(!) year old thread isn't exactly helpful especially since it is about Avast Inernet Security, version 7.0.1466
If you had read the entire thread you would have seen that the problem was solved and also that there is workaround.
As you are the only one mentioning this problem, it very much look like the problem is specific to your system and without knowing more details we or avast can't help you.