Avast Free Antivirus 2015 [Download] Unique Home Network Security function - With just one click, you can scan your network for potential security issues to help prevent attacks on your routers and network. Improved Antivirus and anti-spyware engine performance - The scanning engine has been optimized to allow faster scans of EXE files - twice as fast, while scans of text contents (such as web pages and documents) are up to 10 times faster. Continuous Streaming Updates - Every day, at least 250 virus-database micro-updates (the size of a simple text message, every 3-5 minutes) give you real-time protection against zero-day threats. New Design of the User Interface (UI) - Following on the success of the previous avast! UI, we listened to your feedback and improved the experience. We simplified the navigation and action buttons and reorganized the Settings in one simple place. Browse securely & privately - We added a Do Not Track feature to our browser plugins that identifies tracking software and gives you control over what companies can follow what you do online.