What Moon OS Removes From Windows and What You Lose With It

Every custom build makes a trade: less weight, fewer parts. This page lists what Moon OS leaves out, so nothing you depend on surprises you after the install.

By Technical AnshuWindows 11 based custom build3 minute read

Watch the video for the on-screen tour of what the build includes and skips

Moon OS is light because things were taken out - that is not a side effect, it is the entire method. The build information for this release lists dozens of removed components. Some you will never miss. A few matter a great deal, and they are the ones glowing red in this page. Read this list against your own habits before installing: if your daily work needs a removed part, no lightness is worth losing it.

Moon OS build information - removed components (from the build listing)

Windows Defender - REMOVED System Restore - REMOVED Windows Media Player and media codecs - removed Xbox components and Game Bar pieces - removed Windows Subsystem for Linux - removed Print to PDF, Remote Assistance, Internet Explorer parts - removed Many inbox apps, themes and background services - removed

From the published build information for this Moon OS release; exact lists can change between versions.

The Two Removals That Change Your Safety

Windows Defender is removed. The PC has no built-in real-time antivirus until you install one yourself. That must be your first job after setup - a trusted free or paid antivirus, installed from its official site. System Restore is also removed, so the classic "roll back to yesterday" rescue does not exist. Your safety net becomes your own backup: a disk image or file backup on an external drive, made before you need it. On a custom build, backups are not a good habit - they are the only habit that saves you.

Things That Simply Will Not Work

Xbox app and Game Pass PC features - the Xbox components are gone, so do not choose this build for a gaming-first PC
Windows Subsystem for Linux - developers who run Linux tools inside Windows need a different OS
Some media playback - with Windows Media Player and parts of the media codec stack removed, a few formats need a third-party player like VLC, which happily supplies its own codecs
Windows Hello conveniences and various small features - face/fingerprint setup pieces, widgets and assorted inbox apps are trimmed or absent
Print to PDF and some printing extras - listed as removed, so test your exact printer workflow early if printing matters to you

What Still Works Perfectly Well

The core of Windows is untouched: normal desktop software - Chrome and other browsers, Microsoft Office and LibreOffice, VLC, PDF readers, accounting apps like Tally, ZIP tools, and your printer's own driver software - installs and runs the normal way, because it is still Windows 11 underneath. File Explorer, Device Manager, networking, Wi-Fi, Bluetooth and Windows activation behave as you expect. For a browsing, documents and light-work machine, most users honestly never touch the removed list.

The Rule for Checking Your Own Must-Haves

Before installing on any real machine, write down the five things that PC must do - for example: print bills, run Tally, attend video calls, play local videos, use a scanner. Then test exactly those five inside a virtual machine install. Five green ticks means the removals do not touch your life. One red cross means choose official Windows instead, and save yourself a weekend.

The removals are permanent for that installation. You cannot tick a box later and get Defender or System Restore back inside Moon OS - getting them back means reinstalling an official Windows. Decide with the list in front of you, not after the install.

Watch the Complete Moon OS Video

See the full download, install and first-look walkthrough on screen, step by step, in the video.

Watch Full Video

Common Questions (FAQ)

Why is Moon OS so much lighter than normal Windows 11?

Because its makers removed dozens of components from the install image - Defender, System Restore, Xbox parts, media components, many apps and background services. Less installed means less RAM and disk used at idle.

Can I add back a removed component later, like System Restore?

Practically, no. Deep removals in custom builds are not designed to be reversed. If you need a removed component, the real fix is reinstalling official Windows, where everything is present.

Does Microsoft Office work on Moon OS?

Yes. Ordinary desktop software installs and runs normally because the build is still Windows 11 underneath. It is the Windows built-in extras - Store/Xbox/WSL type features - that are missing.

This guide is based on the Technical Anshu video above - Moon OS is an unofficial community build, not a Microsoft product. Stuck on a step? Ask in the video comments.