Thanks for the explanation. But in my post I distinguish between unloading and “not installing”, didn´t I? I don´t know if the feature of “not installing” was implemented in 4.1.280. Btw, in avast! home page we cannot know what we are downloading… I tryed to download the entire setup file 4.1.280 but I´m not sure if I am downloading the 4.1.278… In the main page is not shown the 4.1.280 too!!! 