What is Windows Mini 11?
See this guide fromMiniTooland it’s possible for you to find some details about this mini OS.
Compared to Windows 10, Windows 11 uses more space.
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For Windows 11, this team once released Mini11 21H2 and Mini11 22H2.
If you use an old computer, you might easily install this lite OS.
Speaking of PC backup, you’re free to execute the powerful andfree backup software MiniTool ShadowMaker.

This program allows you to backup files, folders, Windows, disks, and partitions with simple clicks.
Get it and follow the guide How to Backup Windows 11 to External Drive (Files & System).
Then, go toDOWNLOAD OPTIONS > ISO IMAGE FILES.

You will see multiple ISO files for different versions and you should tap on one to start downloading.
Step 2: grab the ISO file you have downloaded and configure something.
Then, start burning the ISO to the USB drive.

Step 3: start your PC and boot to BIOS.
Then, start the system from USB.
And you see three editions:
Choose one and finish the installation by following the on-screen instructions.
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It doesnt include Edge and you might run online window Downloader to install it.
When needed, get one.