avast! Free Antivirus 17.1.2286:

- Improved user interface - simplified navigation, new brand colors, notification center.
- Behavior Shield - better protects you against ransomware by monitoring running programs for suspicious behavior.
- Game mode - helps reduce distractions and lag times by automatically prioritizing your game’s performance and suspending all unnecessary background notifications and processes while you play.
- Free version no longer requires email registration.
- Performance improvements - faster webpage loading and app launching thanks to optimized hashing algorithms.
- Wi-Fi Inspector - previously called Home Network Security, this feature now detects even more problems and vulnerabilities on both home and public networks.
- Passwords - faster UI and improved browser integration.
- Real Site - our new name for SecureDNS, which prevents DNS hijacking to help you avoid visiting fake websites.
- SafeZone browser - common settings for all modes, faster startup of bank mode, currency converter.

avast! Free Antivirus 12.3.2279:

- Passive mode - new compatibility mode, which should solve compatibility issues, when Avast is being installed on a pc, where other AV is installed (and registred to WSC), Most of the shields are turned off, Avast should be updatable.
- Added SafeZone browser, Security browser extension and SafePrice extension to Settings->Components for better management.
- Fixed bugs.

avast! Free Antivirus 12.2.2276:

- Regular monthly program updates - automatic and silent, configurable via Settings.
- Fully compatible with Windows 10 Anniversary Update.
- The new Components menu in program Settings - an easier way to control which components are installed and running.

avast! Free Antivirus 12.1.2272:

- Lower system impact - faster boot time, less space taken on disk.
- CyberCapture - better detection of unknown and unique files via our cloud technology.
- Regular monthly program updates - automatic and silent, configurable via Settings.
- Improved detection of router vulnerabilities.
- New Bank mode in SafeZone browser.
- Faster SecureLine connection.
- Antispam is now as opt-in component.
- Removed hardware virtualization (NG) - replaced with CyberCapture,that has much lower impact on system resources.
- Removed Remote assistance - not used enough and not a core functionality.

avast! Free Antivirus 2016.11.2.2262:

- Fixed Bugs.

avast! Free Antivirus 2016.11.2.2260:

- SafeZone browser is now included also in free version.
- Avast program updates are now automatic and silent by default - can be changed via Settings->Update.
- Faster computer startup.
- Fixed issues with Firewall on Windows 7.
- Fixed postpone function on restart dialog.
- Fixed starting Pay mode in SafeZone browser.
- Better notification about email signatures.

avast! Free Antivirus 2016.11.1.2253:

- New firewall driver for Win8/10 - fixes issues with non working firewall.
- SecureLine start is faster - new OpenVPN method.
- Easier turning off email signatures.
- Faster loading of passwords list.
- Fixed installation of SafeZone browser.
- Extensions are now Firefox 64-bit compatible.
- SafeZone browser: Added security extension (phishing protection).
- SafeZone browser: Fixed Pay mode crashes.
- SafeZone browser: Settings and bookmarks now synced to Pay mode (after browser restart).
- Security fixes.

avast! Free Antivirus 2016.11.1.2245:

- Added option to disable the email signature to Setttings-> General.
- SafeZone browser now automatically imports bookmarks and passwords from old SafeZone.
- Added shortcut for SafeZone browser to systray menu.
- Passwords extension for Firefox is now signed.
- Added icons for scans.
- HTTPS scanning now supports SPDY protocol.
- Fixed problems with browsing on Windows XP.
- Fixed issues with expired certificates needed for HTTPS scanning.
- Update popup not shown when just checking for latest version.
- Fixed missing option to delete custom scan.
- Fixed wrong displayed text in menu.
- Fixed problems with SecureDNS.
- Fixed missing Spanish language in Home network security.

avast! Free Antivirus 2016.11.1.2241:

- Avast can now manage your passwords and generate strong passwords for you.
- User interface - More space for content, easy control.
- Feedback possible directly from program - report bugs, feature requests and other suggestions easier.
- Home network security now detects more router vulnerabilites and shows more details.
- Installation - it should be now faster and less obtrusive.
- WebShield HTTPS Scanning: Introduced a new method of HTTPs scanning. It is used in Firefox, Chrome and Opera.
- Many other minor tweaks and bug fixes.

avast! Free Antivirus 2015.10.4.2233:

- Better server selection list in SecureLine.
- Fixed bugs.

avast! Free Antivirus 10.3.2225:

- Fixed Bugs.

avast! Free Antivirus 10.3.2223:

- Grimefighter is now redone and called Cleanup.
- Improved Windows 10 compatibility.
- Ability to check compatibility issues with other antivirus software.
- Host-based intrusion prevention system (HIPS): an installed software package which monitors a single host for suspicious activity by analyzing events occurring within that host.
- StreamFilter with HTTPS scanning  is now available also for Windows XP/Vista.
- NG is not using Volume Shadow Copy Service anymore.

avast! Free Antivirus 10.2.2218:

- Faster start after reboot - some components are loaded later.
- File System Shield -  solved incompatibility with TrueCrypt.
- File System Shield - exclusions work again.
- Added option to install Skype during Avast installation.
- StreamFilter - Improved compatibility with other AV products.

avast! Free Antivirus 10.2.2215:

- Fixed Bugs.

avast! Free Antivirus 10.2.2214:

- Improved Windows 10 Compatibility.
- Browser Cleanup integrated to Avast UI and added to Smart Scan.
- WebShield improvements for faster browsing and fixed issues with expired certificates.
- Avast NG virtualization – performance and stability fixes.
- AccessAnywhere feature is removed and replaced with remote connection feature available through Account screen in all editions(not limited to Premier).
- New design of Chrome plugin.
- Better license activation during setup.

avast! Free Antivirus 10.0.2208:

- Fixed Bugs.

avast! Free Antivirus 10.0.2206:

- HTTPS scanning. Ability to detect and decrypt TLS/SSL protected traffic in the Web-content filtering component.
- AVAST NG. A hardware based virtualization solution capable of running each Windows process in standalone safe virtualized environment (VM) and fully integrated to your desktop.
- Home Network Security. Scan your home network for vulnerabilities (wifi status, connected devices, router settings, factory passwords, etc.).
- Smart Scan. Integrated all on demand scans into one (Antivirus, Software updates, Home Network, GrimeFighter).
- New Support System. Easy contact for paid users to submit a ticket with all info included automatically.
- General bugfixing.

avast! Free Antivirus 9.0.2021.515:

- Improved the security of the product.
- Added "resume" support in the setup component.
- Included a new antispam library.
- Warnings during the installation process.
- Added ability to disable promotion popups.
- General bugfixing.

avast! Free Antivirus 9.0.2021.515:

- Improved the security of the product.
- Added "resume" support in the setup component, so some of you should notice smoother downloading.
- Included a new antispam library (IS/Premier editions) for better accuracy of our anti-spam module.
- Put warnings during the installation process if there could be some obvious problems resulting in not 100% functionality after the installation.
- Performed a static analysis of our code resulting in many fixes.
- General bugfixing.

avast! Free Antivirus 9.0.2018.391:

- Stream Filtering. Fixed stability and compatibility issues.
- Firewall. The firewall should be more stable and with better compatibility with other network applications.
- Android protection. We can protect (if you wish) your Android phones and tablets with avast! Free Mobile Security (through your active Google Account) automatically.
- A lot of fixed issues your reported to us.

avast! Free Antivirus 9.0.2016.330:

- Stream Filtering -- fixed stability and compatibility issues, it's running smooth and fast now.
- ARA/ARC -- implemented internal architecture improvements.
- Firewall -- the firewall should be more stable and with better compatibility with other network applications.
- Improved Software Updater – new installation wizard lets you download and install multiple updates at once directly from download.com.
- Improved Browser Cleanup – improved detection and removal of browser protectors, those tools that try to block us from getting rid of annoying toolbars.
- Improved GrimeFighter – now supporting 12 additional languages and with an advanced console for more control of optimization tasks.

avast! Free Antivirus 9.0.2013.292:

- Fixed Bugs.

avast! Free Antivirus 9.0.2011.263:

- Fully rewritten the WebShield.
- The installer/updater has been improved to allow more reliable installation in case of infected machines.
- The changes in the File System Shield's driver should result in faster performance, especially in the copy files and install programs scenarios.
- Beefed up the Browser Cleanup tool to be able to rip off even the more stubborn toolbars and other "PUBEs" (Pontentially Unwanted Browser Extensions).
- Connectivity to the new avast! GrimeFighter product.
- SafePrice  is a new, optional module of the Avast browser plugins.
- Fixed bugs.

avast! Free Antivirus 9.0.2008:

- Fixed Bugs.

avast! Free Antivirus 9.0.2007:

- Fixed Bugs.

avast! Free Antivirus 9.0.2006:

- New DeepScreen technology allows avast! to make more intelligent decisions about new/unknown files.
- New Hardened mode for stricter lockdown scenarios.
- Improved cloud scanning features and crowdsourced analysis of suspicious items.
- Continuously streaming update (CSU) technology for up-to-minute detections.
- Improved cleaning of malware.
- All-new web browser plugins featuring comprehensive security ratings, protection against malware, phishing and typosquatting sites and Do-Not-Track (DNT) functionality for improved anonymity on the Internet.
- All-new SafeZone for more secure online shopping and banking.
- Rescue disk - allow users to create a bootable CD or flash disk with Avast on it.
- A new, streamlined user interface for simplified navigation and more user comfort.
- Control and manage all protected devices directly from the Avast console (through integrated the avast! Account).
- Dramatic reduction in product size and memory footprint.
- Faster scanning thanks to optimized scanning engine.
- Completely rewritten setup/updater that makes the installation and upgrade process faster, easier and more reliable.
- Firewall has been redesigned from scratch to allow for better compatibility with latest Windows, better performance and full support for IPv6.
- Network protection component tuning & compatibility (WFP technology on Win8+).
- Various improvement in the Software Updater and Browser Cleanup tool.
- Full Windows 8.1 compatibility.
- Improved general AV performance and stability, including security fixes.

avast! Free Antivirus 8.0.1497:

- Fixed Bugs.

avast! Free Antivirus 8.0.1489:

- BSOD fix in aswTdi.sys.
- Fixed WebRep crashes in IE.
- Fixed WebRep FF issue with not saving the position.
- SecureLine stability improvements.

avast! Free Antivirus 8.0.1488:

- New SecureLine component.
- Screen readers compatibility improved.
- Software Updater improvements.
- Improved stability & performance.
- Fixed glitches in UI.

avast! Free Antivirus 8.0.1483:

- Fixed issue with ZoneAlarm.
- Fixed issue with constant CPU frequency.
- Fixed issue with video players.
- Fixed issue with Virtual PC.
- Added some localizations.

avast! Free Antivirus 8.0.1482:

- Software Health module.
- Browser Cleanup tool.
- New User Interface.
- Improved Autosandbox/Sandbox technlogy.
- Improved General AV performance and stability.

avast! Free Antivirus 7.0.1474:

- Fixed Bugs.

avast! Free Antivirus 7.0.1473:

- Full compatibility with Windows 8.
- Outlook plugin stability and performance.
- Browser plugins stability.
- General AV performance and stability.

avast! Free Antivirus 7.0.1466:

- Fixed "Black screen" syndrome.
- Fixed crashes in IE WebRep module.
- Fixed random switching to the Safezone.
- Improved stability & performance of Outlook plugin.
- Double VPS update sounds.
- Fixed SNX issues.
- Fixed some BSODs.
- Fixed some leaks.

avast! Free Antivirus 7.0.1456:

- Fixed memory leak in aswMon2 driver.
- Fixed problem with random opening of the SafeZone.
- Fixed SSL connection issues with SMTP.
- Fixed blocking of Internet access.
- Fixed missing "Additional protection" tab.
- Fixed crashes in Outlook.
- Fixed some BSODs.

avast! Free Antivirus 7.0.1451:

- Changes in the autosandbox module.
- Improvements in Remote Assistance (support for UAC prompts etc).
- Improvements in SafeZone (protection against kernel-mode keyloggers; Updated SafeZone Browser; clipboard sharing, etc.).
- Outlook plugin redesign.
- Opera support in WebRep.
- SiteCorrect module for the detection of unwanted websites.
- Windows 8 compatibility updates.
- Emergency Updater.

avast! Free Antivirus 7.0.1426:

- Improved File System Shield speed.
- Improved AutoSandbox stability.
- Improved AutoSandbox controls.
- Improved gadgets.
- Compatibility with Win 8 Consumer Preview.
- Greater stability of Outlook plugins.
- Fixed a compatibility issue with offline files.
- Other security and stability-related improvements.

avast! Free Antivirus 7.0.1407:

- Reputation scanning via FileRep (cloud-based).
- Streaming updates.
- Sandbox & Autosandbox improvements.
- Remote assistance.
- Browser protection improvements (including antiphishing).
- New installer.
- Export/Import settings.
- UI facelift.
- Screensaver facelift.
- Runs on Win8 Developer Preview.
- Many other security and stability related fixes.

avast! Free Antivirus 6.0.1367:

- Script Shield now works with Google Chrome, all versions of Firefox and Acrobat Reader.
- Improvements in WebRep plugins (especially IE).
- Stability improvements in aswSP.sys and the avast! sandbox.
- File system shield: improved on-close scanning.
- Web Shield and Script Shield: more options in the UI.
- Added in-product avast! Market.
- Various other security and stability related fixes.

avast! Free Antivirus 6.0.1289:

- New Script Shield - now scanning deeper and supporting more host processes.
- Web Shield now scanning all processes by default.
- Stability improvements in aswSP.sys.
- Better tracking of file sources.
- WebRep now working in new versions of Firefox.
- Under-the-hood improvements in the Behavior Shield and Sandbox modules.
- Solved a compatibility problem with certain Steam-based games.
- Minor improvements in the product UI.
- Various other security and stability related fixes.

avast! Free Antivirus 6.0.1203:

- Improved compatibility with Windows Vista SP0/SP1.
- Firewall: solved the compatibility problem with uTorrent.
- Improved load time of WebRep IE plugin.
- Improvements in the silent installer.
- Improved the CommunityIQ sample submission process.
- Improved detection/removal of the most stubborn rootkits.
- Various stability and compatibility improvements in the sandbox module.
- Added new CreditAlert feature (US customers only).
- Added Thai and Serbian language packs.
- Fixed bugs.

avast! Free Antivirus 6.0.1125:

- Improved tolerance for corrupted installations.
- Solved a compatibility problem with Malwarebytes Anti-Malware Pro.
- Improved cleaning of rootkits.
- Behavior Shield: improved compatibility with other applications.
- Improvements in the CommunityIQ submission system.
- Various performance and compatibility improvements.

avast! Free Antivirus 6.0.1000:

- AutoSandbox – suspicious programs will be optionally run sandboxed.
- avast! WebRep – browser plugin for website reputation rating.
- Script Shield now even in the Free AV.
- Site Blocking now even in the Free AV.
- SafeZone – a special virtualized area for sensitive transactions.
- Restore factory settings command (Settings -> Troubleshooting).
- Automatic actions in the boot-time scan.
- New compression method in the installer makes the setup packages about 20% smaller.
- Script Shield now functional even with IE8/IE9 Protected Mode.
- Sidebar gadget.
- Improved stability/compatibility of the Behavior Shield.
- Improvements in the avast! sandbox.

avast! Free Antivirus 5.1.889:

- Solved compatibility problems with several third-party applications.
- Performance related improvements.
- Various UI related improvements.
- Fixed bugs.

avast! Free Antivirus 5.1.864:

- Boot-time scanner now available even in 64-bit Windows.
- Big improvements in the Behavior Shield.
- Improvements in the antirootkit engine.
- Improvements in the cleaning module.
- Stability/performance improvements in the Web Shield.
- CommunityIQ improvements.
- Added support for sound packs.
- Minor improvements in the user interface.
- Minor fixes in the firewall.

avast! Free Antivirus 5.0.677:

- Performance and stability improvements in the avast! sandbox.
- Changes in the engine allowing us to generically detect/block some new types of exploits.
- Speed improvements in the updater.
- IS: improvements in the Outlook antispam plugin.
- IS firewall: improvement in the path name matching.
- IS: upgraded to the new version of antispam engine.
- Minor changes and fixes in the GUI.
- Added Danish, Hebrew and Urdu language packs.

avast! Free Antivirus 5.0.594:

- Improved interaction with Windows System Restore.
- aswSP.sys: solved a minor stability issue.
- Solved a problem related to inserting of the license files.
- Added the activation code feature.
- Solved a problem when avast was progressively slowing down.
- Performance improvements in the Behavior Shield.
- avast Screen saver now accessible even in 64-bit Windows Vista.
- Stability improvement in aswTdi.sys.
- IS firewall: solved a potential BSOD condition.
- Various improvements in the avast! sandbox module.
- Minor fixes in the GUI.
- Added Catalan and Belarusian language packs.