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Los mejores antivirus libres para windows

Hoy les muestro una lista de 5 antivirus para descargar gratis pero sobre todo son libres:

Clamav



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ClamAV es un antivirus para Microsoft Windows 98/Me/2000/XP/2003, el
cual proporciona un interfaz de usuario gráfico para el motor Clam
AntiVirus.
Puede ser libremente descargado ya que posee licencia abierta GPL, aunque lamentablemente tan solo se encuentra en inglés.
La versión más actualizada del mismo es la 0.91.1 y se actualiza automáticamente a través de Internet

http://w32.clamav.net/

AVG free edition



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AVG Anti-Virus Free Edition

AVG Anti-Virus Free EditionAVG Free is the most popular free solution available at no cost to home users and provides the high level of detection capability that millions of users around the world trust to protect their computers.

* Easy to use, low system resources
* Automatic update functionality
* Real-time protection as files are opened and programs are run
* AVG’s Virus Vault for the safe handling of infected files

http://free.grisoft.com/doc/download-free-anti-virus/us/frt/0

Avast



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Antivirus kernel
Automatic updates
Simple User Interface
Virus Chest
Resident protection
System integration
P2P and IM Shields
Integrated Virus Cleaner
Network Shield
Support for 64-bit Windows
Web Shield
Internationalization

http://www.avast.com/eng/avast_4_home.html

Avira




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Functions and advantages
Protection against viruses, worms and Trojans
Protection against expensive dialers and phishing
Detects and deletes rootkits

Bitdefender



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Virus scanning and removal
On demand scanning - Powerful scan engines ensure detection and removal of all viruses in the wild every time you need it.
Scheduled scanning
The Scheduler lets you plan ahead, and schedule full system/drive scans in the off hours, when you won’t be using your computer.
Immediate scanning
With just a right click you can check your files and folders.
Skinable interface
You can express yourself, designing new interfaces, or you can use those drawn by others.
Quarantine
By isolating the infected files in quarantine, the risk of getting infected diminishes. You also have the possibility to send these files for further analysis to BitDefender Labs.
Reports
When launching a scan you may choose to create a report file where you can see statistics about the scan process.

http://www.bitdefender.es/PRODUCT-14-en--BitDefender-8-Free-Edition.html