Bitdefender for Ubuntu

There are so many third party anti-virus applications to Ubuntu. One of the best anti-virus application is Bitdefender. Check Bitdefender for more information.
Bit defender is one of the efficient and effective virus scanner for operating systems like Ubuntu. For home/personal use you can get one year free license, whereby it is possible to update freely for one year. For free license refer here. Just go to the site and register to get one year free license.

Installation:
there are two types of installations one is from the terminal (hassle free); and the other is manual i.e., from the Bitdefender website; go to the Bitdefender portal and download .DEB file from Bitdefender for Unices, just install it by Debian Package manager.

And from the terminal,
first; go to System > Administration > Software Sources; there under other software (second button) add the following line;

deb http://download.bitdefender.com/repos/deb/ bitdefender non-free

then reload software sources; after update there will be a message, don't worry.
go to terminal; Applications > Accessories > terminal; and then type or paste the following lines, to add gpg key;

wget http://download.bitdefender.com/repos/deb/bd.key.asc
sudo apt-key add bd.key.asc

then, again update (but this time from the command-line, by typing or pasting following line;
sudo apt-get update

after the update, type the following command-line;
sudo apt-get install bitdefender-scanner-gui

that's all it will install two files namely; bitdefender-scanner bitdefender-scanner-gui; the file size will be some where around 35MB.