Ubuntu downloads

I installed Ubuntu yesterday and its finally running right(I think.) I found a website for Linux users https://help.ubuntu.com/community/ListOfOpenSourcePrograms and im trying to download a antivirus. But whenever I try to download it I get an error saying that the End-of-central directory signature not found. Either this file is not a zip file or it constitutes one disk of a multi part archive...ect. Help please?

Linux is not Windows. Windows is not Linux.

Look at the page. It says

"List Of Open-source Programs (LOOP) for Microsoft Windows Operating Systems What is the LOOP list? This is a list of the best open-source applications that run on Windows"

Open-source for Microsoft Windows Operating System
Open-source applications that run on Windows

Notice anything about that?

If you want to have clamav in Linux, and clamtk (the graphical front end)
1) Connect to the internet
2) Open a Terminal
3) Input: sudo apt-get install clamtk

Ubuntu Forums - Absolute Beginner Talk - http://ubuntuforums.org/forumdisplay.php?f=326
Kubuntu Forums - Help the New Guy - http://kubuntuforums.net/forums/index.php?board=7.0

Basic Toolkit
1) Download the Linux Starter Pack - http://www.tuxradar.com/linuxstarterpack
2) Look at the UNOFFICIAL Ubuntu Guide - http://ubuntuguide.org/wiki/Ubuntu:Karmic
3) Look at Psychocats - http://www.psychocats.net/ubuntu
4) Download the Ubuntu Pocket Guide and Reference - http://www.ubuntupocketguide.com/index_main.html


This is why I should read everything. I assumed it was for linux because it said ubuntu. But you know what they say about people who assume. Thank you.