ReactOS(R) is an advanced free open source operating system providing a ground-up implementation of a Microsoft Windows(R) XP compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a complete and equivalent public interface.

ReactOS is the most complete working model of a Windows(R) like operating system available. Consequently, working programmers will learn a great deal by studying ReactOS source code and even participating in ReactOS development.

In short, ReactOS is aiming to run your applications and use your hardware, a free operating system for everyone!

Please bear in mind that ReactOS is still in alpha stage, meaning it is not feature complete and is not recommended for everyday use.

NOTE: This download is in ISO format.