How can I upgrade or install Windows 11 26H1 on unsupported computer?

Using the Install.wim modification method to install Windows 11 26h1 on unsupported hardware is a viable approach, especially if you want a clean, customized installation that bypasses hardware checks. This method involves extracting, editing, and repacking the Windows image before installation, allowing you to disable or bypass TPM, Secure Boot, and other hardware checks.

Step-by-Step Guide: Modifying install.wim for Unsupported Hardware

1. Download the latest Windows 11 ISO directly from Microsoft or your Insider channel.
2. Mount the ISO or extract its contents using 7-Zip. And locate the sources\install.wim file.
3. Create a Working Directory

mkdir C:\Win11Work

    Copy the install.wim file into this directory.
4. Mount the install.wim Image
   Use DISM to list available images:

Dism /Get-WimInfo /WimFile:C:\Win11Work\install.wim

  Choose the image index you want (usually 1).
  Mount the image:

Dism /Mount-Wim /WimFile:C:\Win11Work\install.wim /index:1 /MountDir:C:\Win11Mount

5. Modify the Registry to Bypass Hardware Checks
  Create a registry script to disable TPM/Secure Boot checks.
  Create a file named bypass.reg with the following content:
  Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\Setup\LabConfig]
"BypassTPMCheck"=dword:00000001
"BypassSecureBootCheck"=dword:00000001
"BypassRAMCheck"=dword:00000001
"BypassCPUCheck"=dword:00000001

  Save this file.
  Use DISM to add this registry key to the mounted image:

Dism /Image:C:\Win11Mount /Add-RegFile:C:\Path\to\bypass.reg

6. Commit the Changes and Unmount

Dism /Unmount-Wim /MountDir:C:\Win11Mount /Commit

7. Create a Bootable USB with Modified install.wim
  Replace the original install.wim in the ISO with your modified one.
  Use a tool like Rufus or Microsoft's Media Creation Tool to create a bootable USB from the modified ISO.

8. Boot from the Modified USB and Install
  Boot your unsupported machine from the USB.
  Install Windows 11 26h1 on unsupported hardware; the hardware checks should be bypassed due to   your registry modifications.