Download Avast Free Antivirus 6 
The latest version of avast! antivirus kernel features outstanding detection 
abilities, together with high performance. You can expect 100% detection of 
In-the-Wild viruses (viruses already spreading between users) and excellent 
detection of Trojan horses.
The avast! engine also features outstanding unpacking support. It can scan 
inside the following archives: ARJ, ZIP, MIME (+ all associated formats), MAPI 
(Outlook pst files), DBX (Outlook Express archives), RAR, TAR, GZIP, CAB, BZIP2, 
ZOO, ACE, ARC, LHA/LHX, TNEF (winmail.dat), CPIO, CHM, RPM, ISO, 7ZIP and SIS. 
It also supports a number of executable packers (such as PKLite, Diet, UPX, 
ASPack, PeShield, FSG, MEW etc.).
Resident protection (the real-time protection of the operating system), is 
one of the most important parts of an antivirus program today. avast! features a 
powerful resident module that is able to detect a virus before it has any chance 
to infect your computer. avast! Home Edition contains resident protection of the 
computer file system and a resident module for e-mails and news. 
Avast features a module for the protection of IM (Instant Messaging, "chat") 
programs, and a module for the protection of P2P (peer-to-peer) programs. The 
list of supported IM and P2P programs is extensive with more than 30 programs 
currently supported.