Avast free antivirus feature:
System requirement
Processor Pentium 3, 128 MB RAM, 100 MB of free hard disk space
Microsoft Windows 2000, Microsoft Windows XP/Vista/7 (32/64 bit)
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-root kit protection
Unique "on access" technology checks all kernel-mode drivers that the operating system is loading for signs of root kit behaviour. This enables even unknown root kits 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 Behaviour shield and anti-root kit 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.
Boot-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.
Behaviour Shield
Monitors activity on your computer using a number of sensors (file system, registry and network based) and reports/blocks any suspicious behaviour.
Behavioural Honey pots
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, Azures, Bear Share, Bit Torrent, Bit Comet, Bit Lord, Bit Pump, CZDC++, Direct Connect, donkey, mule, 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.
Smart virus definition updates
Incremental updating system minimizes the size of regular update files.
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.
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.
avast! 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.
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