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ReactOS is an open source effort to develop a quality operating system that is compatible with applications and drivers written for the Microsoft Windows NT family of operating systems (NT4, 2000, XP, 2003).

ReactOS 0.3.14 VLC+FoxIT+Thunderbird

ReactOS 0.3.14 mIRC + WinSPC

ReactOS 0.3.14 Firefox 10

ReactOS 0.3.14 LibreOffice 3.5

ReactOS 0.3.14 Winamp+Creative WaveStudio

ReactOS 0.3.14 Notepad++

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Project Admins:

• Doug Lyons
• Aleksey Bragin
• Colin Finck
• thfabba
• Ged Murphy
• jhenze

[Droid]

Thanks for screenshots :)

[Wiesława Olkowska]

An interesting system, I'm going to test it. Thanks.

[Peter Sharpe]

I'll give it a shot, thank you

[Konstantinos K.]

Alpha stage ..before some idiot try to install it in an actual machine and moaning it's trash or something - Can't wait for the 0.5 beta version !!

[Lewis Butler]

Anyone seeing a Trojan warning during d/l? Getting this from Windows Defender:

Category: Trojan

Description: This program is dangerous and executes commands from an attacker.
Recommended action: Remove this software immediately.
Items:
containerfile:C:\Users...\Downloads\ReactOS-0.4.8-live (1).zip
(1).zip->ReactOS-0.4.8-Live.iso->reactos\system32\drwtsn32.exe
Get more information about this item online.

Identifies as Win32/Tiggre!plock

[Dindin Hernawan]

very good where nowadays there are rarely projects that support old hardware, and the system features are also capable

[markfilipak]

Hello, I'm a bit mystified by this. Perhaps others are, too. I need to ask some technical questions. My background is as a processor architect with Intel, High Integration Microprocessor Operation (HIMO), in 1985.

You are duplicating the NT API, right?
ReactOS is not Linux, right?
Does the kernel run Virtual-86 mode and does it implement all 4 rings?
How-where are you obtaining the kernel?
Have you duplicated or plan to duplicate the Direct-X rootkit?
Would you welcome help? money?

That will do for starters. Thanks.

[EmuandCo]

DirectX rootkit? Please elaborate what you are talking about

[markfilipak]

On 23/03/2025 08.26, EmuandCo wrote:

DirectX rootkit? Please elaborate what you are talking about

Hello, EmuandCo, I'm happy to write about this sad affair.

The word "rootkit", first applied to the technique in UNIX, refers to dynamic modification of the
kernel during loading based on conditions found at boot time, so named because the administrator
account of a UNIX installation is called "root".

"Rootkit" in Windows NT4 and its descendants refers to the extension of the UNIX idea to the NT
kernel. It works like this: The memory management unit (MMU) is outside the protected rings of the
x86 processor, so it's properties in real mode and protected mode are identical. When the x86
processor switches to protected mode, ring-3 essentially becomes an address-extended version of real
mode. While in real mode prior to the switch, parts of the MMU address space are double-mapped so
that, in protected mode, ring-3 will have a path directly into ring-0 that bypasses callgates. The
rootkit was called "Direct-X". Microsoft did this to speed hardware access in order to improve
gameplay. Virus writers discovered this and used it to rootkit their code. Thusly was born the
rootkit virus.

I assume ReactOS is duplicating Direct-X. Is it simply duplicating the Direct-X API, or is it also
duplicating the rootkit?