Phoenix LiteOS 10 LTSC Windows 10 Enterprise LTSC 21H2 (19044.1381) Compact Super Lite​

Phoenix LiteOS 10 LTSC Windows 10 Enterprise LTSC 21H2 (19044.1381) Compact | Super Lite

Phoenix LiteOS 10 LTSC
Windows 10 Enterprise LTSC 21H2 (19044.1381) Compact | Super Lite

– Designed to breathe new life into your PC –Designed to work well on older low spec PC’s.
Uses significantly less storage space, idle RAM and CPU Processes.
Improves System Responsiveness.
Reduces Boot Time, and software loading times.
Improves gaming and productivity performance.
Enhances Desktop looks with taskbar transparency and added themes.Also Great for use on modern high end PC’s.
Get your work done faster with increased performance for productivity, and enjoy smoother gaming thanks to increased FPS and improved stability. 

This exclusive TeamOS build is updated to 19044.1381, which is not yet available for download or update through normal Update channels, exclusive to Windows Insiders only!

– A Brand New Low –
This Build uses as little as 200 MB Idle RAM in a 2 GB VM in my testing.
This build should provide you the lightest most streamlined Windows 10 experience you’ve have ever had.

Activate using the KMS method Only (with the included activator)
If you want to add the MS Store to LTSC (this build included) read the bottom of this post please

Recommended for advanced users
For Clean Install OnlyDESCRIPTION:
ISO Size: 1.3GB
Installed Size: 2.6 GB
Author: @FBConan
Supported Languages: English during install, Additional Languages after
Architecture: 64 Bit
Edition: Enterprise LTSC (21H2)
.NET Framework 3.5: Pre-Installed
DirectPlay: Enabled
MS Store: Read Bottom of this Post to Add Store
SMB1: Enabled
SNMP: Enabled
Network Adapter Drivers: Included

Hard Disk Space: 8 GB

Create bootable USB with Rufus Tool, or install in Virtual Machine

Not pre-activated, Activator included in the Start Menu – Tools – 0ptional Folder if needed

Backup and Restore
Additional Windows Features
Some Fonts
And more…

Power Throttling
Automatic Maintenance
Download Blocking
Error Reporting
Virtual Memory
Windows Firewall
Print Spooler

This build cannot receive future OS Features and Updates, and is intended to be that way. Because of this, the OS will remain stable, and the size of it will not grow exponentially like full Windows installs tend to, but remain the same.

To all interested members, thank you for your support, but please be aware that this is a light version of Windows. It does not have every feature in it, many things have been removed to allow it to function with greater performance and less system requirements than Full Windows can offer. If it is missing a feature, or service that you think you need, chances are it was removed intentionally, and can’t be brought back. This Windows was designed with most users in mind, which is why it has most essential features and services included. I try to make builds that are highly functional, yet still very light as far as resources and HDD space requirements are concerned. You have been warned. Please don’t ask me to add things, fix things, change things, or enable things. I’m not going to respond, or start giving tutorials, use Google. I sincerely hope you enjoy my builds, I am very passionate about light Windows, and hope they provide a good experience for you. If not, maybe another light version will better suit your needs, or perhaps full Windows is what you require.


You will need to ENABLE the Windows Update Service if you want to install additional language packs, install apps from the MS Store, Use XBOX Apps, or to let Windows automatically download and install drivers. It is disabled by default, but there is a shortcut to enable it in the Start Menu (in the ‘tools’ folder).

Some services are disabled by default. If you need them, run ‘services.msc‘ and change the startup type of any desired service from disabled, to manual, and apply. (ie. touch keyboard service, biometric service)

*If you have a low amount of physical RAM and apps are crashing, enable a pagefile (Virtual Memory) To fix this issue. It is disabled by default, but easily enabled if needed*

The 0ptional Folder that contains web browsers (Chrome, Edge, Firefox) and Windows Activator is no longer located on the Desktop. It is still included, and found in the Start Menu, under Tools, 0ptional.

Added Software:

Theme Patcher
Start Is Back
Irfan View
Old New Explorer
Win Aero Tweaker
Everything Search Engine
Firewall Kill / Engage Shortcuts
Print Spooler Kill / Engage Shortcuts
Windows Update Service Kill / Engage Shortcuts
7 Included Games
Windows 11 Icons Added
Windows 11 Themes Added
Additional Extra Themes Added
Optional Software:
Registry Tweaks
Custom Icons
User Name Change Shortcut

TinyWall FireWall

Action Center Enabler / Disabler

Installation Issues

The Windows Setup environment (boot.wim) in my releases is a basic, reduced version that saves hundreds of MB from the original MS boot.wim setup file.

Personally, I’ve never had a failed install, or setup issues on any of my PC’s, ranging from 10 year old laptops, to brand new ones, with HDD, SSD, and NVMe Storage, AMD and Intel CPU’s, and both MBR, and GPT partitioned drives.

If you are having issues, please try the following with any of my custom builds, or any other custom build for that matter that you are having an issue installing on your pc:

For anyone who’s having / had issues installing my builds! Read This!

Use Rufus. Leave default settings if you have GPT Partitioned HDD (UEFI).
Change settings to the following, if MBR partitioned HDD (BIOS):


I can confirm, This works on both my MBR, and GPT systems, 10 years old, to brand new.
**Switch USB Ports if getting no driver error**

If that doesn’t work, you can download a stock win 10 iso using MS’s media creation tool, open the iso from MS in poweriso, go into the sources folder, delete the ‘install.esd’ or ‘install.wim’ file. (but still keep the iso open in PowerISO)

Then using 7zip, extract my iso, and put the autounnated.xml file from my root folder, into the root folder of the iso you have open in PowerISO, and the install.esd file that’s in my sources folder, into the sources folder of PowerISO, then save as new iso. Try writing that to a USB. Should fix your issues. :)

You can drag files from File Explorer to PowerISO to copy over.

I also highly recommend that you copy the $OEM$ folder located in my iso’s ‘sources’ folder, to the PowerISO’s ‘sources’ folder before saving the new ISO, to transfer over any optional software included in my builds (ie, Web Browsers, activators etc.)

Additional Language Packs

If you’re having issues installing additional language packs, please follow this guide exactly, this method works flawlessly for me in my testing.

Step 1
Turn On Metered Connection.


Step 2
Select an additional language to install


check the box ‘Set as my Winodws display langauge’, and click Install


After desired language pack(s) are installed, DO NOT set them as your Winodws Display language yet.
Reboot your PC first. After your PC has been rebooted, then you can proceed to change the Windows Display Language from English, to your desired language, followed by the Prompt to Sign out to apply language settings.

The Screen Shots below show I have 4 languages Installed. After following this tutorial, I was able to change languages, and restart my PC without any issues.


Now your PC will be able to safely shut down and restart without issues.


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