Upgrade Unsupported Windows 10 PCs to Windows 11 25H2 Without Losing Programs or Files

When Microsoft announced Windows 11, millions of perfectly functional computers were suddenly labeled "unsupported" due to TPM, Secure Boot, or CPU requirements.

In many cases, however, these systems are still perfectly capable of running Windows 11 with excellent performance—especially after replacing an old mechanical hard drive with a solid-state drive (SSD).

This guide documents the workflow I personally use when upgrading customer computers while preserving:

• Installed programs

• User accounts

• Files

• Settings

• Drivers

• Activation

Rather than performing a clean installation, we'll first complete an in-place upgrade on the original Windows 10 installation, verify the disk is healthy, then migrate everything to an SSD.

Important: This is the workflow I use successfully on many systems. Every computer is different. Always maintain a verified backup before making changes.

Note: Use this guide at your own risk. These instructions could become deprecated due to updates in Windows iso, or other variables out of my control. I will attempt to support you if you comment on the video or reach out over email, but can't guarantee I can answer every question. 

Step 1 - Download Windows 11 25H2

Download the latest Windows 11 25H2 ISO directly from Microsoft.

You can either use:

• Windows 11 Installation Assistant

• Media Creation Tool

• Direct ISO download

Avoid downloading modified ISOs from unofficial websites.

Step 2 - Create the Windows 11 USB

Download the latest version of Rufus.

Select:

• Windows 11 ISO

• GPT

• UEFI

When Rufus asks about Windows customizations, enable:

• Remove TPM requirement

• Remove Secure Boot requirement

• Remove RAM requirement

• Remove CPU requirement

• Remove Microsoft Account requirement (optional)

• Disable Telemetry (recommended)

Allow Rufus to finish creating the USB.

Step 3 - Copy the USB Contents to the Hard Drive

Instead of launching Setup directly from the USB, copy the entire contents of the flash drive to:

C:\Win11

Running Setup locally is generally faster and avoids removable media issues during the upgrade.

Step 4 - Launch the Upgrade

I use the following launcher to perform the in-place upgrade while temporarily applying compatibility-state overrides and starting Setup through Microsoft's Server compatibility route.

The launcher expects the extracted installation media to be located in:

C:\Win11

Before launching Setup, the script:

• Verifies the installation media is complete.

• Confirms the language, edition, and architecture should match the installed Windows.

• Warns you to stop if "Keep personal files and apps" is unavailable.

• Creates registry backups for the compatibility keys it changes.

• Applies temporary compatibility-state overrides (including the older unsupported-upgrade fallback setting).

• Starts Setup with dynamic updates disabled so the installation uses the media's setup engine.

• Create a launcher batch file. Copy and paste the below code and save it as C:\win11\launch_25h2_inplace_unsupported.cmd and run it from an elevated cmd prompt.

During Setup you may notice references to Windows Server. This is expected and is simply the compatibility route used to launch Setup—it does not install Windows Server. Your Windows 11 installation still comes from the Windows 11 media.

Step 5 - Verify "Keep Personal Files and Apps"

This is critical.

You should see:

✅ Keep personal files and apps

If not:

STOP

Do not continue unless you intend to perform a clean installation.

If everything looks correct:

Proceed with the upgrade.

The computer will reboot several times.

Eventually you'll arrive back at your normal desktop with:

• Programs intact

• Files intact

• Settings preserved

Step 6 - Run a Full Disk Check

Before cloning an aging hard drive, verify its integrity.

Open an elevated Command Prompt:

chkdsk C: /r

You'll be prompted to schedule the scan.

Type:

Y

Restart the computer.

Allow CHKDSK to complete.

This may take several hours.

Do not interrupt the scan. You can also run this from the W11 USB.

Step 7 - Prepare for SSD Migration

After Windows has booted successfully:

Shut the computer down.

Install your new SSD in Sata port 2. If in the case of a laptop, you can use a USB to Sata adapter or external sata hard drive enclosure. 

Keep the original HDD installed. 

We'll clone from the original drive.

Step 8 - Boot Into GParted

Boot from your GParted USB.

You'll see both drives.

The goal is to shrink Windows enough that it fits on the SSD.

Step 9 - Shrink the Windows Partition

Resize the Windows partition to approximately:

415 GB

(or whatever size safely fits your SSD).

Do not move the beginning of the partition.

Only shrink from the end.

Step 10 - Move the Recovery / Diagnostic Partitions

If diagnostic partitions exist after Windows:

Move them left.

Your final layout should resemble:

EFI

MSR

Windows

Recovery

Recovery

Unallocated Space

Apply the operations. Wait for completion.

Step 11 - Clone the Drive

Copy each partition individually.

Always copy:

Left → Right

Example:

EFI

↓

EFI

MSR

↓

MSR

Windows

↓

Windows

Recovery

↓

Recovery

Do not use whole-disk cloning.

Step 12 - Match Partition Flags

This is one of the easiest mistakes to make.

Each destination partition should match the source partition's flags.

Typical examples:

EFI:

boot

esp

Windows:

msftdata

Recovery partitions:

hidden

diag

(or whatever flags were present on the source disk)

Apply the operations.

Step 13 - Repair the EFI Bootloader

Shut the computer down, remove the spinning disk, and install the SSD back where the spinning disk was connected.

Usually, the cloned configuration will blue screen and Windows Boot Manager needs to be rebuilt.

Boot from the Windows 11 USB again.

Choose:

Repair your computer

Open:

Command Prompt

Mount the EFI Partition

Launch DiskPart:

diskpart

List the disks:

list disk

Select the SSD:

select disk 0

List the volumes:

list volume

Locate the small FAT32 EFI partition.

Select it:

select volume X

Assign a drive letter:

assign letter=S

Exit DiskPart:

exit

Rebuild Windows Boot Manager

Run:

bcdboot C:\Windows /s S: /f UEFI

If successful you'll see:

Boot files successfully created.

Restart the computer.

Step 14 - Verify Windows Boots

Windows should now boot from the SSD.

Verify:

• User profile loads

• Desktop appears

• Programs launch

• Drivers function correctly

• Internet works

• Windows is activated

Open Task Manager.

You should immediately notice dramatically improved responsiveness compared to the original hard drive.

Step 15 - Expand Windows Back to Full Size

Boot back into GParted.

Move any recovery or diagnostic partitions to the end of the SSD.

Then:

Grow the Windows partition into the remaining unallocated space.

Apply the operations.

Shut down.

Boot normally.

Final Checks

Open:

Disk Management

Confirm:

• Windows occupies the expected space.

• EFI partition exists.

• Recovery partitions remain present.

• No unallocated space remains (unless intentionally reserved).

Conclusion

• By upgrading Windows before migrating to an SSD, you preserve your existing applications, user data, and settings while minimizing the number of variables you have to troubleshoot at once. After verifying the upgraded installation is healthy, cloning to the SSD and expanding the partition gives you the performance benefits of solid-state storage without starting from scratch.

• This workflow has allowed me to extend the useful life of many older computers that would otherwise have been replaced. It's a practical approach for systems that remain reliable but don't officially meet Windows 11's published hardware requirements.