Avira had initially installed and can not complain big date. The system did not slow down, viruses have not been found but there is also no Kroppzeug installed. Other products also had never found anything big. What bothers me, however, is one of the delivery: a welded in plastic wrap cardboard box, a manual, a CD. On the CD is a maybe 2 MB Loader file. Says there is not even the product but it must first be downloaded. Practically that we obtain the latest version, but even stupid for people on a DSL connection. But I am more concerned with the anger of resources. Instead of the CD could also enclose a note with code and URL, because the Internet you have to anyway. And with verkürtzen URLs to keep retyping in check. After installation, I had various advertising insertions and solicitation, deactivate which also provides point deduction. Then left me Avira first in peace. For a free version but I can not accept the full price.