I am a newbie to all of this stuff.
Initially I had a OS CD of Ubuntu 10.4 version. I never tried to install it. Now I have lost my CD somewhere. Earlier I copied the content to my laptop. When I tried to install by copying to another CD/pendrive it didn't install.
Now i am using Windows. But I would like to install Ubuntu, because everyone said that Linux/Ubuntu is an amazing OS.
So I searched in google for a solution. With Unetbootin, pendrive linux, I can make a bootable pendrive to install. But Unetbootin asks for an ISO-image. I did many experiment and wastes more than 9 CD's. I have no experience with that. Where can I get the ISO-image? Actually, what is an ISO-image?