Need advice to install Windows 11 25H2 on unsupported PC

How to install Windows 11 25H2 on unsupported PC? You still possible through registry tweaks and setup configurations during the upgrade process. Here's a free approach tailored to your constraints:

1. Prepare Your System for the Upgrade
Backup Your Data: Always ensure your personal data is backed up before attempting any unsupported upgrade.

2. Create a Bootable USB with the ISO
* You can use Windows' own Media Creation Tool or the DISM command to create a bootable USB:
Mount the ISO or extract it to a folder.
* Use the built-in DISM tool to add boot files or simply copy the ISO contents to a USB drive formatted as FAT32 or NTFS.
* Alternatively, if you already have the ISO, just burn it to a USB using Windows Explorer (by copying files directly). 

3. Boot from the USB Drive
* Restart your PC and boot from the USB.
* Start the Windows setup process.

4. Use a Registry Hack During Setup to Bypass Compatibility Checks
When Windows Setup asks for language and region, proceed until you reach the point where it checks hardware compatibility.
* At this point, press Shift + F10 to open Command Prompt.
* In the Command Prompt, run: regedit
* In Registry Editor, navigate to: HKEY_LOCAL_MACHINE\SYSTEM\Setup
* Create a new key named LabConfig if it doesn't exist:
* Right-click Setup > New > Key > name it LabConfig.
* Inside LabConfig, create DWORD (32-bit) values:
    BypassTPMCheck = 1
    BypassSecureBootCheck = 1
    BypassCPUCheck = 1
    BypassRAMCheck = 1
    BypassStorageCheck = 1
Exit regedit, close Command Prompt, and continue with the installation.
The setup should now proceed despite hardware incompatibilities.

5. Complete the Installation
* Follow the prompts to complete the upgrade.
* Once install Windows 11 25H2 on unsupported PC, verify system stability and drivers.

If the setup still blocks you, you might need to edit the setup.exe to disable the supported hardware checks, the registry approach during setup is your best bet.