Avast Antivirus
Old Version of Avast Free AntiVirus 5.1.864
Selected Version
Avast Free AntiVirus 5.1.864
Supported Systems
Legacy OS support
Windows 98 (Avast 4.8.1367), Me, NT, 2000, XP, Vista, 7, 8
License
Freeware
Release Date
13 January, 2011 (4 years ago )

Sponsored Links

Download Avast Free AntiVirus 5.1.864
Avast Free AntiVirus 5.1.864

Avast Free AntiVirus 5.1.864 (55.29 MB)

okay 0 scans reported this version clean

Sponsored Links

System Requirements of Avast Free AntiVirus 5.1.864
  • Windows 2000
  • Windows XP
  • Windows Vista
  • Windows 7
Additional Requirements

    Avast supports both 32-bit and 64-bit systems

Program Information of Avast Free AntiVirus 5.1.864
Version Name:
Avast Free AntiVirus 5.1.864

File Size:
55.29 MB

Released Date:
13 January, 2011 (4 years ago)

MD5 Checksum:
283bc1c960bbe01e1fdd4bab786232be

SHA1 Checksum:
334586F3D70F258AB5C3C96A330C937BA2CA91EC

Version History of Avast Free AntiVirus 5.1.864
  • 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…

View More...

Avast Antivirus Screenshots
Avast! Antivirus software provides complete virus protection for your computer. The avast! Free Antivirus includes a spyware detection engine which protects… More
You can run a pre-defined scan or to create a custom scan of your own. Multiple scans can be run at the same time. More
The File System Shield is the main component of the Avast! real-time scanner. It monitors all files and programs stored on your computer. More
About Avast Antivirus

Avast! Free Antivirus is the freeware version of Avast! antivirus software available to Microsoft Windows and Linux users, while Avast! Pro Antivirus is offered to businesses and users that want additional features. Priority updates are delivered automatically using PUSH update technology in Avast! Pro Antivirus. Avast! Pro Antivirus also has a command line scanner and a script blocker.

Avast is a multiple recipient of the Virus Bulletin VB100 Award, for detection of 100% of "in-the-wild" viruses, and is a past winner of the Secure Computing Readers' Trust Award. The name Avast comes from "Anti-Virus-Advanced-Set". Avast! Antivirus is a widely used antivirus program, with 100 million users worldwide as of December 2009.

Avast Free Antivirus Features

  • Avast! Antivirus is a widely used antivirus program, with 100 million users worldwide as of December 2009.
  • Resident protection comprising individual modules or "shields", each of which can be individually configured or disabled.
  • Anti-spyware capabilities
  • Anti-rootkit capabilities
  • Self-Protection - Prevents malware from terminating avast! processes and damaging avast! files.
  • Automatic incremental updates - Updates of both the program and the virus database which is used to identify potential threats - Avast! updates its virus definitions on a regular basis (sometimes multiple updates daily) and this process is automated by default.
  • Audible alarms - Vocal warnings and notices such as "Caution, a virus has been detected!" and "Virus database has been updated."
  • Boot-time scan (32 bit only) - Users can schedule a boot-time scan to remove infections that load during Windows startup.
  • Virus Chest - Quarantine; folder where infected files can be stored. The virus chest also stores vital system files to protect them from damage by malware. Users can also add their own files to the virus chest. Once in the chest, a file cannot be executed; double-clicking the file will instead display information about the file.

Updates : Avast Antivirus Updates

Did You Know?

Avast User Interface was changed dramatically from version 4.8 to 5.0.