KDE 4.3.0 for Windows
KDE on Windows is aimed at native porting of the KDE applications to MS Windows. Currently Windows 2000, XP, 2003 and Vista are supported.
The preferred way of installing KDE apps under Windows is the KDE-Installer.
KDE on Windows is not in the final state, so applications can be unsuitable for day to day use yet.
Download: KDE 4.3.0 for Windows