Upgrade Windows 10 to Windows 11 Without USB (No Data Loss Guide)

You can upgrade from Windows 10 to Windows 11 completely for free — without using a USB drive and without losing your files or installed apps. This method works even on unsupported hardware and keeps your personal data safe.

We’ll use the official Windows 11 ISO from Microsoft and run a simple command that bypasses system checks like TPM and Secure Boot. Follow each step carefully and the upgrade will complete smoothly.

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📌 What This Method Does

• No USB drive required
• No data loss
• Keeps apps and files
• Works on unsupported PCs
• Uses official Microsoft installer

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Step 1 — Check Your System Language

The Windows 11 ISO language must match your current Windows language.

Open Command Prompt as Administrator and run:

DISM /Online /Get-Intl

Look for Default system UI language. For example: en-US.

Remember this language for the download step.

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Step 2 — Download Windows 11 ISO

1. Scroll to Download Windows 11 Disk Image (ISO)
2. Select Windows 11 (multi-edition ISO)
3. Choose the same language you saw earlier
4. Click 64-bit Download

The file is around 5–6 GB.

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Step 3 — Mount the ISO

1. Right-click the ISO file
2. Select Mount
3. Open the mounted drive
4. Copy all files inside

Go to your C drive and create a folder named:

C:\Win11

Paste all files into this folder.

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Step 4 — Run Windows 11 Setup (Bypass Requirements)

Open Command Prompt as Administrator and run:

C:\Win11\setup.exe /product server

This launches Windows 11 setup and skips hardware checks.

If you see “Windows Server” text — don’t worry. It still installs Windows 11.

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Step 5 — Start Upgrade

1. Click Next
2. Accept license terms
3. Select Keep personal files and apps
4. Click Install

Your PC will restart several times. Do not turn it off.

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Step 6 — Finish Setup

After installation, Windows boots into Windows 11 with all files and apps intact.

Verify version:

winver

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Step 7 — Clean Up

You can delete the folder:

C:\Win11

to free storage space.

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How to Go Back to Windows 10

You have 10 days to revert:

1. Open Settings
2. Go to System → Recovery
3. Click Go back

This restores Windows 10 without losing data.

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Safety Notes

• This method is legal and uses Microsoft files
• Always backup important data
• Unsupported hardware may have minor issues
• Upgrade takes 30–90 minutes

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Final Result

You now have Windows 11 installed without USB and without losing your files. This method keeps everything intact while bypassing hardware restrictions.

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