Download free antivirus for your computer - Avast, AVG and demo versions of CA Anti-Virus, BullGuard, Nod32

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Download free antivirus for your computer - Avast!

A friend of mine recommended this antivirus program and the English home edition is free!
Download Greek version of Avast

More here:
http://www.avast.com/eng/download-avast-home.html

Another free alternative:

AVG Anti-Virus Free Edition

What you get with AVG Anti-Virus Free Edition

    * Easy to install and use
    * Real-time antivirus protection of files and e-mails
    * Maximum security — recent certifications include VB100%, ICSA, and West Coast Labs Checkmark
    * Regular and automatic database and program updates
    * Windows and Linux
    * And most of all ... great customer satisfaction!

What you do not get

    * Protection against spyware and identity-theft
    * Protection against spam
    * Protection against hackers
    * 24x7 Technical Support
    * High-speed updates
    * Multiple languages
    * Detailed settings
    * Consent for commercial use

CA Anti-Virus 2007 offers free one year subscription.
BullGuard offers 2 months free use
Nod32 offers 1 month free use.
Trendmicro offers free online scanning of your PC.