Avast Release History

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  • Grimefighter is now redone and called Cleanup
    • runs without need of reboot
    • much faster
    • runs on more devices (better compatibility)
  • 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 no longer using Volume Shadow Copy Service



  • 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



  • Fixed bug - unable to insert Avast SecureLine license
  • Fixed problem - failed to load language dll [1033\UILangRes.dll] error after update
  • Fixed incompatibility with Windows Live Mail connection
  • Fixed BCU problems with removing addons in silent mode



  • Compatibility with Windows 10
  • Full integration of Browser cleanup
  • Redesigned browser plugins
  • Changed setup flow for better license activation
  • Avast NG – lot’s of performance and stability fixes
  • AccessAnywhere function is removed and replaced with new remote connection feature available through Account screen in all editions
  • Browser Cleanup integrated to Avast UI and added to Smart Scan
  • GrimeFighter now supports UEFI



  • Fixed a problem with missing NG component under certain circumstances
  • Fixed a bug in the keyboard driver causing problems with keyboards
  • Better compatibility of the Web Shield with some https pages (e.g. spotify, waze, etc.)
  • SecureDNS - better logic of server selection resulting in performance improvements
  • Fixed reported crashes



  • HTTPS scanning - Ability to detect and decrypt TLS/SSL protected traffic in the Web-content filtering component. This feature will protect you against viruses coming through HTTPs traffic as well as adding compatibility for SPDY+HTTPS/ HTTP 2.0 traffic. You can tune/disable this feature in the settings section.
  • 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. Each process is executed in its own instance of VM, which means totally isolated from your other applications. This feature is now powering the Avast DeepScreen, resulting in better detection. Avast NG requires HW virtualization enabled.
  • SecureDNS (this feature is active in the paid versions only) - A new provider which guards against unprotected DNS/DNS hijack on a router/client (including unsecured networks, public ones, etc.).
  • Home Network Security - Scan your home network for vulnerabilities (wifi status, connected devices, router settings, factory passwords, etc.). It helps to discover potential problems not isolated on the articular device only, but in the entire network of devices you use or connect to the Internet from.
  • Smart Scan - Integrated all on demand scans into one (Antivirus, Software updates, Home Network, GrimeFighter). One scan, different results and recommendations.
    • GrimeFighter Free - GrimeFighter will offer free cleaning of junk files and tuning of system settings. These tasks are performed by our Zilch and Torque minions. Other minion functions remain as paid-for features.
  • New Support System - Easy contact for paid users to submit a ticket with all info included automatically. Improved knowledge base for free users. Help is completely online and is more up to date.
  • General bugfixing - This covers a lot of stability & performance changes in all components (but the main focus was traditionally on the network & engine components).



  • Improved the security of the product
  • Added "resume" support in the setup component
  • New version of the antispam library
  • Added warnings during the installation process for compatibility purposes
  • Ability to disable promotion popups (paid versions only)
  • General bugfixing



  • Stream Filtering – fixed stability and compatibility issues, it's running smooth and fast now
  • 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 (during the installation or update)
  • Stability & performance improvements



  • Stream Filtering - fixed stability and compatibility issues, it's running smooth and fast now, so no more browsing problems
  • ARA/ARC - implemented internal architecture improvements, if you can, please test these components, thanks a lot
  • 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. Go ahead and fight the Grime!



  • FIXED: Uninstalling avast might hang at "stopping service: Avast antivirus"
  • FIXED: Upload issues for Dropbox and Flickr
  • Performance and stabilization fixes in Stream Filter - e.g blocking of ajax calls
  • Several firewall fixes - e.g. blocking of Google Earth
  • Stability improvements - several crashes fixed



  • Fully rewritten WebShield so that it now doesn't work as a "transparent proxy" anymore, which should result in an overall improvement in stability and performance. It also allows to see and detect more threats
  • The Firewall component (in IS and Premier) has been made more compatible with other applications, such as Java and various VPN services
  • 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
  • Browser Cleanup tool beefed up to be able to rip off even the more stubborn toolbars
  • For trialware users, we have also added an interactive tutorial that explains all the features of the product in a straightforward, concise manner
  • Connectivity to the new Avast GrimeFighter product
  • SafePrice is a new, optional module of the Avast browser plugins. It's designed to combine security (hence the "safe" part) with best deals (hence the "price") into one, easy-to-use module



  • Fixed issues with Metro apps (after update to Win 8.1)
  • Fixed occassional problem with playing sounds on the VPS toasters
  • Fixed issue with Outpost FW warning („unsinged“ driver)



  • Fixed connection issues from Java applets
  • Fixed issues with Security Center registration
  • Fixed problems with non english languages in RescueDisk
  • GUI fixes
  • Fixed issues with WinDVD and SQL connectors



  • 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



  • Support version for migration to Avast 2014



  • Support version for migration to Avast 2014



  • Support version for migration to Avast 2014



  • Support version for migration to Avast 2014



  • Fixed issues related to Win 8 & Win 8.1
  • Fixed issues in virtualization module (including other x64 platform fixes)
  • Fixed issues in Script shield
  • Outlook plugin fixes



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



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



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



  • Software Health module
  • Browser Cleanup tool
  • New User Interface
  • Compatible with Windows 8
  • Advanced Privacy Tools (Avast Premier only)
  • AccessAnywhere (Avast Premier only)
  • Improved Autosandbox/Sandbox technlogy
  • Improved General AV performance and stability



  • Win8 BSOD fixed (but still investigating some issues)
  • Crashes, freezes on WinXp 64b fixed
  • WebRep™ issues fixed
  • Sandbox stability improved



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



  • 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



  • 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



  • 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



  • Improved File system 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



  • 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



  • 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
  • Avast Internet Security: new antispam engine
  • Web Shield and Script Shield: more options in the UI
  • Added in-product Avast Market
  • Various other security and stability related fixes



  • 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



  • improved compatibility with Windows Vista SP0/SP1 (activation issues)
  • attempt to solve the "Windows Media Player using a red skin" problem
  • Firewall: solved the compatibility problem with uTorrent
  • improved load time of WebRep™ IE plugin
  • fixed a bug in Google Chrome WebRep™ plugin causing excessive CPU usage
  • improvements in the silent installer
  • improved the CommunityIQ sample submission process
  • improved detection/removal of the most stubborn rootkits (TDL family)
  • various stability and compatibility improvements in the sandbox module
  • added new CreditAlert feature (US customers only)
  • added Thai and Serbian language packs



  • solved a problem in aswSP.sys that could lead to a system crash
  • improved tolerance for corrupted installations
  • when updating from a previous version of avast Pro/IS, SafeZone is now automatically added
  • solved a compatibility problem with Malwarebytes Anti-Malware Pro
  • improved cleaning of rootkits
  • fixes in Chrome WebRep™ plugin
  • Behavior Shield: improved compatibility with other applications
  • improvements in the CommunityIQ submission system
  • various performance and compatibility improvements



  • solved a compatibility problem with ZoneAlarm (WinXP)
  • added WebRep™ Chrome extension
  • improved installation of the WebRep™ plugins (especially Firefox)
  • various fixes and improvements in the avast sandbox
  • setup programs now smaller by ~20%
  • Community features and the Welcome screen can now be turned on/off directly from program settings
  • solved a compatibility problem with Outpost firewall
  • solved a bug related to the AutoSandbox offer (WinXP)
  • gadget can now be removed by simply closing it
  • solved a compatibility problem with GameGuard and sXe
  • SafeZone improvements
  • improved sandbox logging
  • SafeZone is now a standalone setup package (can be installed/uninstalled separately)
  • improvements in password processing
  • improvements in the program uninstaller
  • solved a memory leak in the avast gadget
  • fixes in the File System Shield transient cache
  • various stability/compatibility improvements



  • NEW! AutoSandbox – suspicious programs will be optionally run sandboxed
  • NEW! Avast WebRep™ – browser plugin for website reputation rating; a combination of data from our virus lab and community voting
  • NEW! SafeZone – a special virtualized area for sensitive transactions (e.g. secure online banking) (paid products only)
  • Script Shield now even in the Free AV
  • Site Blocking now even in the Free AV
  • fixed USB Safe Removal issue
  • Restore factory settings command (Settings -> Troubleshooting)
  • Automatic actions in the boot-time scan
  • Script Shield now functional even with IE8/IE9 Protected Mode
  • Sidebar gadget
  • Improved stability/compatibility of the Behavior Shield
  • Improvements in the Avast sandbox
  • fixes in the Outlook plugin



  • solved a compatibility problem with CorelDraw X5
  • solved a compatibility problem with Acer control software
  • solved a problem inserting a license file via the installation wizard
  • solved a compatibility problem with some Dell wireless network adapter drivers
  • solved a compatibility problem with Game Guard (used by a number of games)
  • solved a compatibility problem with Sibelius
  • solved various 0xC0000005 and 0xC000007B errors (e.g. with some .NET applications)
  • issues related to upgrades from v5.0 (inactive shields, missing right-click associations, missing 64-bit boot-time scanner etc)
  • solved some possible deadlock conditions (relatively rare but possible)
  • performance related improvements
  • various UI related improvements



  • 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



  • solved a problem that could lead to disappearing of the avast service
  • Behavior Shield: solved a minor stability issue (aswSP.sys) + solved a Win7 issue
  • 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: fixed a vulnerability in aswFw.sys (Secunia Advisory SA40868)
  • solved a vulnerability related to license files (Secunia Advisory SA41109)
  • solved a problem with scanning of files with very long path names
  • fixed the updater in East-Asian versions of avast running with Windows set to a different locale
  • 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
  • fixes in the screen reader support
  • fixed a bug where the File System Shield was scanning some files even after being disabled
  • added trimming of setup.log
  • added Danish, Hebrew and Urdu language packs



  • improved interaction with Windows System Restore; namely, avast now auto-repairs itself when it detects a corrupted VPS due to a System Restore (or other reasons)
  • 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 (especially in conjunction with the screensaver)
  • performance improvements in the Behavior Shield
  • avast Screen saver now accessible even in 64-bit Windows Vista
  • stability improvement in aswTdi.sys (solved a compatibility problem with AVG)
  • 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



  • Solved a bug related to submission of false positives
  • Improvements in the Behavior Shield (realtime antirootkit part)
  • Sandbox: many functional, stability and performance improvements
  • Firewall: VPN compatibility fixes (should now work even in Public zone etc)
  • Firewall: solved an issue related to hang and/or crash of the afwServ.exe process
  • Finally works with major screen readers (avast is now blind-friendly)
  • Compatibility improvements in the Web Shield
  • Various fixes in the Outlook antispam add-in
  • Improved detection of droppers
  • Setup program of the Pro AV now also accepts v4.x license keys
  • Right-to-left support
  • Added Croatian and Arabic language packs



  • scanning and virus chest features now accessible even from Windows Safe Mode
  • aswSP.sys: solved a minor stability issue (fixed duplicating of protected handles)
  • Pro AV / IS: solved file enumeration problem on FAT32 partitions
  • enhanced compatibility with various Winsock LSPs
  • various improvements in the Avast sandbox
  • improved cleaning of file infecting viruses
  • added compatibility with screen readers; Avast should now be reasonably accessible to visually impaired users
  • system files imported to the virus chest after upgrade from v4.8 are now removed
  • IS firewall: solved a problem related to VPN connections (Windows XP)
  • IS firewall: solved a problem related to Xbox360 media sharing
  • IS firewall: solved a potential BSOD condition when changing logical drive mappings
  • IS firewall: solved a potential crash when saving the packet rules
  • IS firewall: fixes for Internet Connection Sharing
  • IS firewall: Windows 2000 compatibility
  • IS firewall: solved a compatibility problem with Logitech Desktop Manager
  • Pro AV / IS: solved a compatibility problem with PerfectDisk 11
  • Pro AV / IS: ashCmd.exe switch /@ should work again
  • Pro AV / IS: solved a compatibility issue with Acronis True Image
  • various fixes in the Outlook antispam add-in
  • fixes in ashUpd.exe
  • minor improvements in the installer, especially when upgrading from avast v4.8
  • Avast Screen saver can be now configured via the screensaver properties dialog
  • minor fixes in the GUI
  • added Dutch, Portuguese (Portugal), Norwegian, Finnish, Slovenian, Turkish and Vietnamese language packs



  • important fixes related to the installation of the firewall under 64-bit Windows
  • fixed a potential memory leak in the firewall
  • Vista/W7: solved a compatibility problem with System Restore
  • added access keys – the program can be easily now controlled via keyboard
  • solved a problem with the "I only connect to the Internet using a dial up modem" update setting
  • fixed multiple issues in the sandbox (plus a few performance improvements)
  • this new version is now able to communicate with Avast WHS Edition
  • fixed a bug related to the inserting of license files into the program
  • fixed a problem in the Outlook plugin related to inserting of notes into HTML emails
  • solved a compatibility problem with SmithMicro Poser 8 and similar applications
  • improvements in the submission system
  • improvements in the Free AV registration system
  • better handling of errors in case of real-time shield actions
  • improved compatibility with Apple BootCamp
  • improved default firewall rules
  • low priority scans now use much less CPU (but run accordingly longer)
  • components of the avast setup/update process are now digitally signed
  • minor improvements in the GUI
  • new language packs: Greek, Slovak and Ukrainian. This makes the current number of supported languages 19.