What is KJOS ?

Learn more about KJ's Windows 11 custom ISO

KJOS is a free, open-source and ultra-lightweight operating system based on Windows 11, while removing all the problems associated with it.

Everyone complains about the descent into hell that Microsoft is causing with its OSes, including Windows 11.

To cite a few examples: Telemetry, data collection, abundant and ubiquitous ads, sponsored applications, Windows 11 hardware limitations (TPM, Secure Boot...), hidden services etc.

KJOS eliminates all these problems and offers a simple, fluid OS that's accessible on almost any device!

Minimal Configuration

Specs

KJOS

KJOS-Lite

CPU

1C/2T 2GHz

1C/1T 1GHz

RAM

2GB

1GB

Storage

25GB SSD

12GB SSD

Recommended Configuration

Specs

KJOS

KJOS-Lite

CPU

2C/4T 2GHz

2C/2T 1GHz

RAM

4GB

2GB

Storage

64GB SSD

32GB SSD

KJOS is based on Windows 11 Pro, which means that if you have a Windows 11 Pro license, your system will be activated automatically!

On the other hand, if you'd like to install KJOS-Lite (based on Windows IoT LTSC, an official, optimized vesion of Windows 11) or if you don't have a Windows 11 Pro key, you can always buy a license online or get your own. Several methods are explained in the documentation.

Comparison

Specs

KJOS

KJOS-Lite

Windows based version

Windows 11 Pro (24H2)

Windows 11 IoT LTSC (24H2)

Boot Mode

UEFI

BIOS

Free & Open-Source

TPM 2.0 & Secure Boot Free

Debloated ISO

Optimized Settings

Windows Updates

Windows Defender

Windows Activation

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🟡

Microsoft Edge Uninstallation

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Include Windows' Default Apps

☑️

Microsoft Account & Online Services

Telemetry, Ads, Data Collection & Widgets

☑️ OneDrive and MS Store

🟡 Available after OS installation

Learn More