Congratulation Avast ;D :o :o :o :o
From the Avast Blog https://blog.avast.com/2011/06/03/160-milionow-zarejestrowanych-uzytkownikow-oprogramowania-avast/
Polish to English translation
160 million registered users of avast!
It would seem that the statistics do not belong to the most interesting subjects to describe the blog. And as usual - the exception proves the rule. 
This exception is statistics on users of avast!.
With these numbers, we can confidently confirm that avast! remains the most popular free anti-virus software in the world. Since its release a free version and the first registration in 2002, the user community is constantly growing. In 2006, registered 20 million users of our program, in 2008 - 50 million and in 2009 crossed the magical number of 100 million. At the end of May 2011 160 millionth registered user avast! Free Antivirus.
The founders and owners of the company, Eduard KuÄŤera and Pavel Baudis, in my wildest dreams did not expect such success, when they decided to release a free version for home use and non-commercial.
Program’s success by many factors. Undoubtedly played a large role in the software qualities such as high efficiency, ease of use, lightweight, good distribution or the fact that it is translated into over 35 languages​​. All this would not be possible without you - our members. Therefore, we sincerely thank you for the tremendous contribution to the development of our software. Instructing us, helped us achieve this amazing result.
Written by: Julia Szymańska
Edit: Keep on growing and never give up your dream goal to all the Avast Staff and members who help the beta testing congratulation.