Description

   Worldwide (English) Worldwide (Español) Australia (English) Brasil (Português) Canada (English) Canada (Français) Česká republika España (Español) France Deutschland (Deutsch) Italia (Italiano) Polska (Polski) Россия (Pусский) Türkçe (Türkiye) United Kingdom العربية 日本 (日本語) 中华人民共和国 (中文) Homepage Products Support About Us avast! worldwide website Download avast! Free AntivirusThe world’s most popular free antivirus software: 100 million registrations and growing. 
Select download  Multilanguage (43MB) English (40MB) Spanish (40MB) Portuguese (40MB) Italian (40MB) German (40MB) French (40MB) Japanese (40MB) Polish (40MB) Chinese (Simplified) (40MB) Czech (40MB) Russian (40MB) Download now 
Or get comprehensive protection with avast! Internet Security
For on-line shopping and banking, upgrade to avast! Internet Security. Increase your on-line security:

avast! Sandbox - lets you safely browse suspicious websites or applications 
Silent Firewall - blocks hacker attacks to protect your identity 
Antispam - keeps your mailbox free from spam and scam messages 
Upgrade to avast! Internet Security Antivirus and anti-spyware Ensures all mails sent and received are clean Keeps you protected from "chat" infections Stops attacks from hijacked websites Compatible with Windows XP, Vista and 7 New user interface 

Why choose this product? Technology Compare products All downloads avast! Free Antivirus - great antivirus and anti-spyware softwareavast! Free Antivirus is perfect for people who send e-mails and surf popular websites. But if you store sensitive data on your computer, shop or bank on-line, we recommend the comprehensive protection in avast! Internet Security.

Key technologies Antivirus and anti-spyware engine 
 avast! Intelligent Scanner 
 Silent/Gaming Mode 
 Behavior Shield 
Real time anti-rootkit protection 
Smart virus updates 
avast! Community IQ 
Behavioral Honeypots 
Green computing 
avast! iTrack 
File System / Mail Shield 
Web Shield 
IM / P2P Shield 
Network Shield 
For system requirements and detailed information about key technologies, please click here.

System requirementsProcessor Pentium 3, 128 MB RAM, 100 MB of free hard disk space 
Microsoft Windows 2000, Microsoft Windows XP/Vista/7 (32/64 bit) 
Core and detection Antivirus and anti-spyware engine
State of the art scanning engine provides reliable protection against viruses, spyware and other forms of malicious software.

Real time anti-rootkit protection
Unique "on access" technology checks all kernel-mode drivers that the operating system is loading for signs of rootkit behavior. This enables even unknown rootkits to be detected and stopped before they can do any damage.

avast! Community IQ
Most samples we process come from sensors deployed throughout the avast! community in the Behavior shield and anti-rootkit modules. This is a unique source of data made possible only thanks to our huge user base. Most of the collected samples are analysed by a number of automated processes and only a small fraction of the samples need to be processed manually by our virus analysts.

 Code emulator
When a suspicious executable is encountered (during both on-demand and on-access scanning), avast! is able to emulate the program’s code in an isolated environment. The code emulator is used for two purposes. First, it is used for generic unpacking. Secondly, it is used in the heuristics engine. Technically, this is done using dynamic translation, a method much faster than traditional emulation techniques.

 Heuristics engine
Starting with version 5.0, avast! features a new heuristics engine designed to proactively detect malware undetectable with normal definitions. The heuristics engine is able to cover both binary (executable) and script malware.

Potentially unwanted programs detection
New in version 5.0, avast! now detects potentially unwanted programs, such as remote admin tools and commercial key loggers. Custom rules can be set for dealing with these types of programs.

ScanningBoot-time scanner
Allows you to scan your computer for infections before the operating system has started and before a virus can be activated (32-bit operating systems only).

Wake-up for scan
Microsoft Windows is woken from sleep or hibernation mode, performs a scheduled scan, then returns back to sleep mode.

Scheduled scanning
Allows users to define the scan time and files to be scanned.

 avast! Intelligent Scanner
Can reduce the number of required file scans by up to 80% through a white list of proven safe applications. Files identified as safe are not rescanned unless they change.

Shields Behavior Shield
Monitors activity on your computer using a number of sensors (file system, registry and network based) and reports/blocks any suspicious behavior.

Behavioral Honeypots
avast! sensors identify and monitor suspicious file activity on selected computers, automatically submitting files to the Virus Lab for additional analysis.

File System Shield
Real-time scanning of opened/executed files.

Mail Shield
Scans all incoming/outgoing e-mails for malware. For MS Outlook, a special plug-in is used. Other email clients are protected by a generic POP3/IMAP4/SMTP proxy. New in version 5, the proxy also supports scanning of SSL communication (gmail.com, sympatico.ca, ….)

Web Shield
Scans all visited web pages and checks all files, pages and java scripts downloaded from the internet. Thanks to the Intelligent Stream Scan feature, the Web shield doesn't slow down your web browsing.

P2P Shield
Checks files downloaded using P2P programs. - ABC, Ares, Azureus, BearShare, Bit Torrent, BitComet, BitLord, BitPump, CZDC++, Direct Connect, eDonkey, eMule, iDC++, iMesh, Kazaa, Kceasy, LimeWire, Morpheus, Opera's DC++, Overnet, Qtrax, Shareaza, SoulSeek, StrongDC++, uTorrent, Vuze, WinMX, Winny2, Zultrax.

IM Shield
Checks files downloaded while using instant messaging or “chat” programs. - AIM (AOL Instant Messenger), Gadu-Gadu, gaim/Pidgin, Google Talk, ICQ, IM2 Messenger, Infium, Miranda, mIRC, MSN/Windows Messenger, Odigo, PalTalk Messenger, Psi Jabber Client, QIP, QQ, SIM, Skype, Tlen, Trillian, WengoPhone, XFire, Yahoo! Messenger.

Network Shield
Provides protection against network-based viruses. The module has two main components: a URL blocker, designed to block malicious URLs (as defined by the Virus Lab), and a lightweight intrusion-detection system.

UpdatesSmart virus definition updates
Incremental updating system minimizes the size of regular update files.

 Fast application of updates
New format for the virus definition file speeds up application of updates into avast! 5.0 and reduces demand on CPU/memory, resulting in uninterrupted computer use.
New format for the virus definition file means faster updates and reduces demand on CPU/memory, resulting in uninterrupted computer use.

Gaming Silent/Gaming Mode
New Silent/Gaming Mode automatically detects full-screen applications and disables pop-ups and other on-screen notifications without degrading security.

Optimized for latest Intel Core i7 CPUs
Critical sections of the avast! scanning engine code have been optimized to deliver unrivaled performance on the latest Intel chips.

CPU optimization Multi-threaded scanning optimization
avast! runs faster on new multi-core CPUs. A new avast! feature allows the splitting of large individual files between cores, accelerating the scanning process.

Green computing
Reduced demands on the disk drive result in lower energy consumption.

Miscellaneousavast! iTrack
Real-time graphic scanning reports.

 Graphical user interface
Easy to navigate graphical interface.

Automatic processing
Infected files are processed automatically without requiring user instructions.

Technologies that are not included in avast! Free AntivirusSilent Firewall
The firewall enables you to control incoming and outgoing traffic from your computer. Protection is based on heuristic and behavioral analysis, and a white list of known safe applications. There are three network settings which can be changed depending on the type of connection.

Antispam
New comprehensive SPAM and fraudulent message filter. It works as a plug-in to MS Outlook and a generic POP3/IMAP4 proxy for other email clients.

avast! Sandbox
Enables potentially exploitable programs (such as web browsers) and/or suspicious executables to be run in a safe, virtual environment. The avast! Sandbox is unique as it runs on both 32 and 64bit platforms.

Script Shield
Detects malicious scripts hidden in internet web pages and prevents them from running and hijacking or potentially causing damage to your computer (Internet Explorer only, 32-bit only).

Command-line scanner
Enables you to run a scan directly from the command line.

For complete on-line protection, we recommend avast! Internet Security. Comprehensive features include firewall, antispam, avast! Sandbox and Script Shield. Click here to get avast! Internet Security.

Do you need more than avast! Free Antivirus?avast! Free Antivirus is perfect for people who send e-mails and surf popular websites, but do not store any sensitive data on their computers. Check the following comparison table to see how you can increase your protection with avast! Internet Security - the recommended product for people that shop and bank on-line.

 avast! Free Antivirus
For ordinary Internet use avast! Pro Antivirus
Customizable security avast! Internet Security
For shopping and banking 
Compare by features    
Continuous protection against viruses and spyware    
Ensures all mails sent and received are clean    
Keeps you protected from "chat" infections    
Stops attacks from hijacked websites    
Faster updates    
Lets you safely browse suspicious websites or applications    
Blocks hacker attacks to protect your identity    
Keeps your mailbox free from spam    
  Learn more  Learn more  
Compare by usage    
Sending e-mails    
Chatting    
Surfing popular websites    
Surfing high-risk websites    
Shopping and banking online    
Storing sensitive or financial data    
  Learn more  Learn more  
Compare by technologies    
 Antivirus and anti-spyware engine    
Real time anti-rootkit protection    
File System / Mail Shield    
Web Shield    
IM / P2P Shield    
Network Shield    
Behavior Shield    
Script Shield    
 avast! Sandbox    
 Silent Firewall    
 Antispam    
  Learn more  Learn more  

avast! Free Antivirus 5.0 
Multilanguage (43MB)  Download  
English (40MB)  Download  
Spanish (40MB)  Download  
Portuguese (40MB)  Download  
Italian (40MB)  Download  
German (40MB)  Download  
French (40MB)  Download  
Japanese (40MB)  Download  
Polish (40MB)  Download  
Chinese (Simplified) (40MB)  Download  
Czech (40MB)  Download  
Russian (40MB)  Download  

Yeni versiyon 5.0 için Türkçe dil seçeneği şu anda mevcut değildir. Şimdilik İngilizce versiyonu kullanabilir, Türkçe versiyon sürüldüğünde dil seçeneklerinden dili değiştirebilirsiniz

الإصدار 5.0 الجديد غير متوفر حالياً باللغة العربية . إذا رغبتم فبإمكانكم إستخدام إصدار اللغة الإنكليزية حالياً و التحويل إلى اللغة العربية لاحقاً عند توفرها

avast! 4.8 Home Edition (old product) 
Danish (Denmark) (43MB)  Download  
Slovenian (43MB)  Download  
English (44MB)  Download  
Malay (43MB)  Download  
Russian (44MB)  Download  
Catalan (43MB)  Download  
Hungarian (43MB)  Download  
Portuguese (Brazil) (44MB)  Download  
Swedish (43MB)  Download  
Spanish (44MB)  Download  
Finnish (43MB)  Download  
Arabic (44MB)  Download  
Slovak (43MB)  Download  
Chinese (Taiwan) (43MB)  Download  
Macedonian (43MB)  Download  
Korean (Korea) (43MB)  Download  
Dutch (43MB)  Download  
Chinese (Simplified) (43MB)  Download  
German (44MB)  Download  
Romanian (43MB)  Download  
Italian (44MB)  Download  
Serbian (43MB)  Download  
Norway (43MB)  Download  
Greek (43MB)  Download  
Polish (43MB)  Download  
multi-language (81MB)  Download  
Japanese (44MB)  Download  
Czech (43MB)  Download  
Croatian (43MB)  Download  
Portuguese (44MB)  Download  
Turkish (43MB)  Download  
Bulgarian (43MB)  Download  
French (44MB)  Download  


 
Trusted and liked 
Over 100 million people have avast protecting their computers, making avast one of the world’s leading – and most trusted – antivirus programs. They also like us, regularly placing avast at the top of user ranking charts over other antivirus products.

What people say"Hi avast! team, after some internet research and reading good reviews of your antivirus software, I plumped for AVAST. Both my wife and I really like the simplicity of AVAST and feel reassured when the AVAST voice notifies us when the updates have been completed rather than having to go through a sequence of button pushing to clear the screen. I have also noticed that our computers are allowed to do what they do best, without the irritating interruptions or slow downs. KEEP UP THE GOOD WORK and grateful thanks for your free Home software."
C.W., United Kingdom
"Over the past few years, recommending avast! has been good for my reputation, but maybe bad for short-term repeat business! Sometimes people will get back to me a week or two after installing avast! and say something like; 'With all those 'providers', I thought it would use a lot my computers resources, but it's running so smoothly I barely notice it'. avast! seems to be better coded and compiled compared to other, apparently smaller "footprint" programs."
P.E., AustraliaHome | Privacy Policy | Free Antivirus | Internet Security | avast! on Twitter | avast! on Facebook 
avast! antivirus software provides complete virus protection for your computer. Antivirus engine is complemented by anti-spyware, firewall and antispam modules to protect you against phishing schemes, identity theft and internet-distributed web viruses. Automatic updates for greater user convenience and safety. Top user ratings among free antivirus software. Download avast! antivirus software for a free 30-day trial period.

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