# ReactOS 0.3.1 Released

DevFeed: [ReactOS 0.3.1 Released](<https://devfeed.tech/articles/reactos-0-3-1-released-33171.md>)

Original publisher: [Read original article](<https://reactos.org/project-news/reactos-031-released/>)

Published: 2007-03-11T00:00:00Z

Content type: release

Language: en

Sources: [Front Page on ReactOS Website](<https://devfeed.tech/sources/front-page-on-reactos-website.md>)

Topics: [ReactOS](<https://devfeed.tech/topics/reactos.md>), [releases](<https://devfeed.tech/topics/releases.md>), [Kernel](<https://devfeed.tech/topics/kernel.md>), [Operating system](<https://devfeed.tech/topics/operating-system.md>), [boot](<https://devfeed.tech/topics/boot.md>)

Tags: [boot](<https://devfeed.tech/tags/boot.md>), [bugfixes](<https://devfeed.tech/tags/bugfixes.md>), [core](<https://devfeed.tech/tags/core.md>), [free](<https://devfeed.tech/tags/free.md>), [kernel](<https://devfeed.tech/tags/kernel.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [os](<https://devfeed.tech/tags/os.md>), [qemu](<https://devfeed.tech/tags/qemu.md>), [react](<https://devfeed.tech/tags/react.md>), [reactos](<https://devfeed.tech/tags/reactos.md>), [releases](<https://devfeed.tech/tags/releases.md>), [splash-screen](<https://devfeed.tech/tags/splash-screen.md>), [usb](<https://devfeed.tech/tags/usb.md>), [win32](<https://devfeed.tech/tags/win32.md>), [winapi](<https://devfeed.tech/tags/winapi.md>)

## AI overview

ReactOS 0.3.1 was released after nearly half a year of development. The release focused on substantial changes to the core, including the kernel, HAL, bootloader, runtime library, drivers, registry support, Win32 subsystem, user-mode DLLs, and boot video support. It was an alpha-stage release intended mainly for virtualizers and emulators because testing on real hardware was incomplete.

## Source excerpt

ReactOS 0.3.1 Released! It's been almost half a year since the last release (0.3.0). And all this time work was going on like crazy - sometimes up to 50 commits per day. Mainly, the work focused on rewriting certain parts of the ReactOS Core (kernel, HAL, bootloader, etc). It's very hard to sum up the huge Changelog in an outline, but briefly: Freeldr was improved HAL's key areas have been significantly improved (irql-related, bus support, kd-functions) The Kernel experienced a massive rewrite of incompatible parts (and is still in the process of improvement) Run-time library (Rtl) got a lot of improvements and bugfixes Bugs were fixed in kernel-mode drivers and a better USB driver was added Registry-support has been greatly improved thanks to addition of "cmlib", a library shared by the boot loader and the kernel to handle binary registry hives; it even supports binary registry hives created by Windows More fixes in the Win32 subsystem and user-mode DLLs Boot video driver (and a splash screen) was added Read through the changelog, and you will see the amount of changes in this release!