How to Install Tiny 11 Without Losing Your Files

Back up your files before you start

Tiny 11 is a stripped-down version of Windows 11 that removes built-in apps, telemetry, and some system features to run on older hardware. Installing it over your current Windows setup carries a real risk: if something goes wrong during the installation, you could lose everything on your drive. The safest approach is to back up your files to an external drive or cloud storage before you touch anything.

You have two backup options. The fastest is to copy your Documents, Pictures, Downloads, and Desktop folders to an external USB drive or external hard drive — just drag and drop them. The more thorough option is to use Windows Backup (built into Windows 11) or a third-party tool like Macrium Reflect Free to create a complete image of your drive. An image is a single file that contains everything on your computer, and you can restore it if the installation fails.

If you use cloud storage like OneDrive, Google Drive, or Dropbox, make sure your important files have synced to the cloud before you begin. Check that the files show a green checkmark or "synced" status in the app. Do not rely on cloud sync alone — also copy files to a physical external drive as a second backup.

Key Takeaways

Back up your files to an external drive or cloud storage before starting, because Tiny 11 installation can fail and wipe your drive.
You will need a USB drive with at least 8 GB of space to create the Tiny 11 installation media on another computer.
During installation, choose "Custom" and select only the drive or partition you want to replace — do not select "Upgrade" if you want to keep your files on a separate drive.
After installation, reinstall your programs and restore your backed-up files from the external drive or cloud storage.
Tiny 11 lacks Windows Update and some built-in recovery tools, so keep your backup for at least a month after installation.

Create the Tiny 11 installation media on another computer

You cannot install Tiny 11 from within Windows itself. Instead, you need to create a bootable USB drive on a different computer — a laptop, desktop, or even a friend's machine. This USB drive will contain the Tiny 11 installation files and will start your computer from scratch.

First, read Tiny 11 from the official source. The most common version comes from a GitHub repository maintained by the creator. You will read an ISO file — a single compressed file that contains the entire Windows installation. Save this file to your computer.

Next, get a USB drive with at least 8 GB of space. It does not need to be fast, but it will be erased during this process, so use one that does not contain files you need. Plug it into the computer where you downloaded the ISO file.

Use a tool like Rufus (free, Windows only) or Balena Etcher (free, works on Windows, Mac, and Linux) to write the ISO file to the USB drive. read Rufus or Balena Etcher, open it, select your USB drive, select the Tiny 11 ISO file you downloaded, and click "Start" or "Flash". The process takes 5 to 15 minutes. When it finishes, eject the USB drive safely.

Boot from the USB drive and start the installation

Plug the USB drive into the computer where you want to install Tiny 11. Restart the computer and watch the screen carefully as it starts up. You need to press a key — usually Delete, F2, F12, or Esc — to enter the boot menu before Windows loads. The exact key appears on the screen for only a few seconds, so watch closely.

In the boot menu, select the USB drive (it may be labeled with the drive's brand name or "USB Device"). Your computer will restart and load the Tiny 11 installation screen.

The installation will ask you to choose a language and keyboard layout, then click "Next". On the next screen, click "Install now". You will see a screen asking you to accept the license terms — read it if you want, then check the box and click "Next".

Choose "Custom" installation to protect your existing files

The next screen is the most important one: it asks whether you want to "Upgrade" or do a "Custom" installation. If you choose "Upgrade", Windows will try to keep your files and programs, but this can fail and leave your system broken. If you choose "Custom", you will select exactly which drive or partition to replace, and you can leave your files on a different drive untouched.

Click "Custom (advanced)". The next screen shows all the drives and partitions on your computer. This is where you must be careful. If your computer has only one drive, you have two choices: install Tiny 11 on that drive and lose everything (because you backed up first), or stop here and use a different method like dual-booting or a virtual machine.

If your computer has two drives — for example, a C: drive with Windows and a D: drive with your files — select only the C: drive (or whichever drive holds Windows). Do not select the D: drive. Click "Next" and the installation will proceed on only the drive you selected, leaving your files on the other drive intact.

If you have one drive split into multiple partitions, select only the partition that holds Windows (usually labeled "C:" or "System"). If you are unsure which partition is which, stop and ask someone familiar with your computer before continuing — selecting the wrong partition will erase your files.

Complete the installation and restore your files

The installation will copy files to your drive, which takes 10 to 30 minutes depending on your computer's speed. Your computer will restart several times. Let it finish without interrupting — do not unplug the USB drive or turn off the computer.

When the installation finishes, you will see the Windows setup screen asking for your region, keyboard layout, and Microsoft account information. You can sign in with your existing Microsoft account (the same one you used on the old Windows installation) or create a new local account. Tiny 11 works with both.

Once you reach the desktop, plug in the external drive where you backed up your files. Open File Explorer and copy your Documents, Pictures, Downloads, and Desktop folders from the external drive back to your computer. If you created a complete backup image, you can restore individual files from it using the backup tool you used to create it.

You will need to reinstall your programs — Microsoft Office, Chrome, Photoshop, or whatever else you use. Tiny 11 does not include most programs, only the Windows operating system itself. read and install each program from its official website or from your installation media.

Understand what Tiny 11 lacks and plan accordingly

Tiny 11 removes Windows Update, the built-in system that normally downloads security patches and bug fixes. This means you will not receive automatic updates. You can install updates manually by downloading them from Microsoft, but you have to do it yourself. This is a significant security trade-off — your computer will be more vulnerable to viruses and hacking if you do not stay on top of updates.

Tiny 11 also removes Windows Defender (the built-in antivirus) and some recovery tools. You should install a free antivirus like Windows Defender Offline or Avast Free, and keep your backup for at least a month after installation in case you need to restore your system.

Some programs may not work on Tiny 11 because they expect certain Windows features that have been removed. If a program fails to install or run, you may need to reinstall standard Windows 11 or troubleshoot the specific program. This is rare, but it can happen with older software or specialized tools.

Frequently Asked Questions

What if I only have one drive and no external backup?

Do not install Tiny 11 yet. Buy an external USB drive (even a cheap 64 GB drive is enough) and back up your files first. Installing Tiny 11 on a single drive without a backup is risky — if the installation fails, you will lose everything with no way to recover it.

Can I go back to regular Windows 11 after installing Tiny 11?

Yes, if you kept your backup. You can restore your complete backup image, or you can reinstall Windows 11 normally using Microsoft's installation media. You will lose any files or settings you created after installing Tiny 11, so back up again before you switch back.

Will my programs work on Tiny 11?

Most common programs like Chrome, Office, and Zoom work fine. Some older or specialized software may not work because Tiny 11 removes certain Windows features. Test your most important programs on Tiny 11 before you delete your backup — if something does not work, you can restore your old Windows installation.

Do I need a product key to install Tiny 11?

No. Tiny 11 is a modified version of Windows 11 that does not require set up. However, if you want to use certain features like personalizing your desktop background, you may see a watermark until you set up Windows with a valid key.

How long does the whole process take?

Backing up your files takes 30 minutes to a few hours depending on how much data you have. Creating the USB drive takes 15 minutes. The installation itself takes 20 to 40 minutes. Reinstalling your programs takes as long as you need — usually an hour or more. Plan for a full afternoon or evening.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.