Linux has a lot to offer. There are a huge range of programs for the KDE desktop that are nicer than their Windows counterparts. There are also a tonne of tiny utilities that perform specialist tasks.
The Windows KDE project will let you run programs written for KDE on your Windows Desktop. Once all of the libraries and files are installed, you can run the programs as if they were designed for Windows. There is no virtual computer or emulator you need to load up.
The installer is very simple to use. You can select what you want the installer to download and install. The Windows KDE project comes with a wide range of games and utilities that will get you started. The Amarok music player was a highlight for me. Additional programs can be added, but you will need to compile them, or wait for updates.
The project is still fairly young and is still in alpha phase, so there may be some stability problems. I did not come across any in my playing around with it. It worked really well. This is a project that I predict will become hugely popular in the coming years.
The Windows KDE project currently works on XP, 2000, 2003, with Vista support on its way shortly.
Get your copy from the KDE on Windows website.