Avast! 5.1 final officially released [Direct download link]

AVAST Software, a popular antivirus and internet security products maker based in Czech Republic, has just released the new 5.1 version of its popular Avast! antivirus product aim to give you the top grade protection against computer viruses and other malware threats.
The most notable improvements in avast! 5.1 are:

• Boot-time scanner now available even in 64-bit Windows
• Big improvements in the Behavior Shield
• Improvements in the antirootkit engine
• Improvements in the cleaning module
• Stability/performance improvements in the Web Shield
• CommunityIQ improvements
• Added support for sound packs
• Minor improvements in the user interface
• Minor fixes in the firewall

Based on the award-winning avast! antivirus engine, Avast! Antivirus 5.1 comes in 3 flavors – Free Antivirus, Pro Antivirus and Internet Security. Avast! Free Antivirus is one of the best free virus protections currently available on the market [ad-supported, also offers to download and install Google Chrome]. For non-commercial and home use only. Avast! Pro antivirus, the paid upgrade from the better-known Avast Free antivirus,  offers a number of additional features, including a script shield and a process virtualization module, while avast! Internet Security comes with an antispam filter and built-in firewall.

Direct download link For Avast! 5.1 final:
Avast! Free Antivirus: http://files.avast.com/iavs5x/setup_av_free.exe
Avast! Pro Antivirus: http://files.avast.com/iavs5x/setup_av_pro.exe
Avast! Internet Security: http://files.avast.com/iavs5x/setup_ais.exe
You can also get this new version by checking for updates via GUI in Avast 5.0 .