When you bought the package they should have given you instructions.

Alternatively, you could install clamav using Synaptic. It runs on Linux, scans
for Windows malware.

I located the programme in question but on the website (beta.eset.com/linux)
the file I found was called ueav.i386.en.linux. It was stated to run on both
Debian and Ubuntu, so a perfect fit. It only required one small change
before installing with one click. The change was to mark it executable -
right click, choose properties, permissions tab, near the bottom select
"Allow executing file as program". It might prompt you for this change but
I'm old-fashioned enough to do it manually.

I use Kubuntu 10.10, and its possible Ubuntu is a little different.

After this change a left click on the downloaded file started the graphic
installation utility and it was an easy install. It runs fine on my system
now, although I don't need it and probably won't keep it.

My best advice to you is - forget about the tar file you have and do
yourself a favour by downloading and using this version. "it just works".

I have that other file,too. Will try to install that.
As for using NOD32, I've always used it as it was the only AV that would work
WITHOUT Internet Exploder originally. It's small, fast and been really
dependable.
I've never upgraded IE on any computer. I hate it. Haven't used it since version
4. It's forbidden (hopefully) by the firewall to call out. I'm glad Ubuntu
gives me a choice.

NOD32 has a beta version for Linux from here.

http://beta.eset.com/linux

Actually I think it's out of beta. I got it installed.
Tested it with a windows file type that gave me fits yesterday. NOD32 caught the
bad file and deleted it as I requested.
Since I download for 2 XP machines that have no online connection/security, I
want to make sure of what I'm installing on them.

The file was an INF, somehow it got on an SD card that is only used for a
camera. Ubuntu told me it was read only, XP said read only - couldn't delete the
file. XP laptop with all security flashed a warning, NOD quarantined and
removed the file, so I was able to format the card. Rechecked the card after
formatting in camera, and there were only pictures on the card. Nothing else.

As as aside, we don't download from cameras. We use card readers.

Glad to hear the problem is solved, and we both learned something from
the process!