Go the legal way, use Ubuntu.
Ubuntu is a type of linux. There are many flavours of linux like opensuse, fedora, mint, puppy, DSL, etc. I have used and using Ubuntu so I highly recommend it to you also as it is free, fast, stable, eye candy and something new. Ubuntu 8.10 Interpid Ibex is released. Now a quote from Ubuntu’s official site
Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers. Whether you use it at home, at school or at work Ubuntu contains all the applications you’ll ever need, from word processing and email applications, to web server software and programming tools.
Ubuntu is all in one. After installing Ubuntu you are ready for multimedia, word processing, viewing pictures, sufting net, etc. You don’t need to install anything else like in Windows.You also don’t need anything else like antivirus for Ubuntu. Ubuntu is a very secure & stable OS. Even I use Ubuntu as a dual boot OS along with XP/Vista. You can also use Wubi installer to install Ubuntu from within Windows itself, just like you are installing a program in Windows. Later on if you think that Ubuntu is not for you, then you can remove it from Add/Remove programs, if you are not satisfied. There is no need to format the partition therefore, you can just install it as a dual boot. Use both OS side by side and you may start liking this new OS.
So just give Ubuntu a try, who knows, you may start liking it.