Tiny11 25H2 Install Guide Lightweight Windows 11 for Old PCs
Your PC is too old for normal Windows 11, or normal Windows 11 is simply too heavy for it. Tiny11 25H2 strips Windows 11 down to the essentials — here is the full, honest install guide.
✍️ Technical Anshu🪟 Windows 11⏱️ 10 minute guide
🎥 Watch the full Tiny11 25H2 installation in the video — every step shown live
Tiny11 is a modified version of Windows 11 created by an independent developer called NTDEV. It removes the pre-installed apps, the hardware checks and a lot of background extras, so Windows 11 can run on machines with as little as 2 GB RAM and no TPM chip. One thing must be clear from the first line: Tiny11 is not made by Microsoft and Microsoft does not support it. If that trade-off is acceptable for an old PC, a test machine or a spare laptop, this guide takes you from download to desktop — with the safe route at every step.
Windows Setup — stock Windows 11 vs Tiny11 25H2 on the same old PC
Stock Windows 11 setupThis PC can't run Windows 11BLOCKED
Tiny11 25H2 setupInstalling Windows — progress runningOK
TPM 2.0 checkRemoved from the image
Secure Boot checkRemoved from the image
Microsoft account screenLocal account allowed
Illustrative panel. On hardware that fails the TPM 2.0 or CPU checks, stock setup stops with an error — a Tiny11 image skips those checks, which is the whole reason it exists.
1
Know the Two Editions Before You Download
Tiny11 25H2 (build 26200) comes in two flavours, and picking the wrong one is the most common beginner mistake.
Tiny11 (standard) — the balanced build. Bloatware is removed, but Windows servicing is kept, so Windows Update still works. This is the edition almost everyone should install.
Tiny11 Core — a much smaller image (the ISO is around 3 GB instead of roughly 5 GB) that removes even the servicing components. Updates and adding features back later are limited or impossible. Use Core only for quick tests and throwaway virtual machines.
If you are putting Tiny11 on a real PC you plan to use daily, choose the standard edition. Core is a demo, not a daily driver.
2
Download Only From the Developer's Own Sources
Because Tiny11 is popular, the internet is full of repacked copies — and a modified Windows ISO from a random site is one of the easiest ways to install malware with your own hands. There are only two safe routes:
Prebuilt ISO: NTDEV's own upload on the Internet Archive (archive.org), linked from the developer's official channels.
Build it yourself: the open-source tiny11builder scripts from the official GitHub account ntdevlabs, applied to a genuine Microsoft Windows 11 ISO. This is the route NTDEV himself recommends for the newest builds, because you can read exactly what the script removes.
Whichever route you take, verify the file hash before using it. In PowerShell, run Get-FileHash C:\path\to\tiny11.iso -Algorithm SHA256 and compare it with the SHA256 published next to the download. If the two do not match exactly, delete the file and download again.
3
Check Your PC — The Real Requirements Are Low
Tiny11 25H2 is famous for running where stock Windows 11 refuses to install. The practical minimums are:
CPU: any 64-bit processor (x64; there are separate ARM64 builds for ARM devices)
RAM: 2 GB minimum — 4 GB is noticeably more comfortable
Storage: about 8-15 GB free for the system itself; keep extra space for your files and updates
TPM 2.0 and Secure Boot: not required — those checks are removed from the image
Low requirements do not mean magic. A PC with a dead hard disk, failing RAM or a 15-year-old single-core CPU will still be slow. Tiny11 removes Windows' weight — it cannot repair weak hardware.
4
Make the Bootable USB With Rufus
The install media is made exactly like a normal Windows USB:
Take a USB drive of 8 GB or more — everything on it will be erased, so back it up first
Open Rufus (free, from rufus.ie), select your USB drive and the Tiny11 ISO
Choose GPT partition scheme for a UEFI machine, or MBR for a very old Legacy BIOS machine
Click Start and wait for the Ready message
No special Rufus tricks are needed for Tiny11 — the requirement bypass is already built into the image, unlike a stock ISO where Rufus has to patch the checks for you.
5
Install — Back Up First, This Erases the Disk
Warning: a clean install deletes everything on the target drive. Copy your documents, photos and browser data somewhere safe before you begin. Then:
Plug in the USB, restart the PC and open the boot menu (commonly F12, F9, Esc or F8 — it varies by brand)
Select the USB drive and let Windows Setup start — it looks like the normal Windows 11 setup, because underneath, it is
Choose language and keyboard, click Install now
When asked for a product key, click I don't have a product key for now — activation is handled later and needs a genuine Windows licence (explained in our activation guide)
Select the edition, choose Custom install, pick the drive, delete the old Windows partitions if this is a full clean install, and let setup copy files
After the restart, remove the USB so the PC boots from its own disk
Task Manager — typical idle figures people report after install (your PC will differ)
RAM in useabout 1.5-2 GB
Disk usedabout 8-15 GB
Background appsVery few
Example figures only, from commonly reported installs. Measure your own PC after installing — see the honest numbers guide linked in the FAQ section of this series.
6
First Boot — Set Up Offline, Then Update and Check
Tiny11 setup lets you create a local account — no Microsoft account is forced on you, which is one of its most-liked features. After the desktop appears:
Connect to the internet and open Settings → Windows Update → Check for updates. On the standard edition, updates download and install like normal Windows — let them finish before judging performance
Open Device Manager and look for yellow warning signs. Old PCs often need a Wi-Fi, sound or graphics driver from the laptop maker's website
Check what is missing. Edge, the Microsoft Store and many bundled apps are not included — install a browser of your choice from its official site
Confirm Windows Security (Defender) is running; basic antivirus protection is included
Give the system a day of normal use and a few restarts before deciding how it performs — the first hour after any Windows install is always the busiest.
🛑 Honest line before you commit: Tiny11 is an unofficial, modified Windows. Microsoft offers no support for it, some big feature updates can misbehave, and a few deeper protections that depend on TPM and Secure Boot are weaker or absent. It is a sensible tool for reviving an old PC or testing — it is not what we recommend for your main office PC, banking machine or any computer holding critical work. The full honest breakdown is in the next guide in this series.
🎥 Watch the Complete Tiny11 25H2 Install in the Video
USB creation, boot menu, setup screens and the first desktop — the whole installation, demonstrated live on a real PC.
Tiny11 itself is a free modification project by NTDEV, but it is still Windows underneath — you need a genuine Windows licence to activate it, exactly like stock Windows 11. Tiny11 does not come with any licence, and copies sold as 'pre-activated' are not legitimate.
Will Windows Update work on Tiny11 25H2?
On the standard edition, yes — servicing is kept and regular cumulative updates install normally. On Tiny11 Core, servicing components are removed, so updates are limited. Large feature upgrades can still be unreliable on any modified build, which is why the builder route — rebuilding a fresh image from a new Microsoft ISO — exists.
My PC has only 2 GB RAM. Will Tiny11 really run?
It installs and runs, and idle RAM use is commonly reported around 1.5 to 2 GB, far below stock Windows 11. But 2 GB is a floor, not a comfort zone: a browser with many tabs will still struggle. For a genuinely usable old laptop, 4 GB RAM and an SSD make a bigger difference than any software trick.
This guide is based on the Technical Anshu Tiny11 25H2 installation video • Stuck on any step? Ask in the video comments — help is available there 🙏