Avast Free Antivirus v.9.0.2011..263

Avast (stylized as avast!) security software products are developed for Microsoft Windows, Mac OS X, Android and Linux users by AVAST Software s.r.o., a Czech private limited company. Avast was founded in 1988, and is headquartered in Prague, Czech Republic.[1][2] It produces antivirus and security programs for personal and commercial use.



In January 2015, Avast had 21.4% of the worldwide security vendor market share.[3] As of March 2015, Avast had 233 million users of its products and services worldwide.[4] According to a company press release, Avast protects more than 30 percent of the consumer PCs in the world outside of China.[5] The software products have a user interface available in 45 languages.



Avast has 500 employees; 90 percent of whom work in the Czech Republic. Avast has 13 offices in Prague, Brno, Germany, China, South Korea, Taiwan, and the U.S.[i