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Our office has a test machine running Windows 11 24H2. However, the machine is not officially supported by Windows 11 as the CPU is not incompatible. We changed the registry and managed to install Windows 11 on it.
Now, we need to test the app performance on latest Windows 11 25H2. How can we do that? Is 25H2 ISO available for download?
P.S. The PC has a good hardware profile with Intel i9 CPU, 16GB RAM and 1 TB SSD.
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I have a very similar situation with an oldish MSI laptop. Everything is supported for Windows 11 except for the CPU. I was able to install Windows 11 and able to get the 24H2 update installed. Maybe waiting for roll-out? Or will it not install even though 24H2 is installed (and working)?
Microsoft has released an enablement package KB5054156 with more information/links here: https://support.microsoft.com/en-us/topic/kb5054156-feature-update-to-windows-11-version-25h2-by-using-an-enablement-package-4d307e2d-3028-4323-bb46-552cff491643
Hello, thank you for reaching out to Microsoft Q&A.
The Windows 11 25H2 version has not yet been released to the general Public. If you are an insider, you can download Windows 11 , version 25H2 via the Windows Insider ISO download page
Let me know if you still need more help.
To install Windows 11 25H2 on unsupported PC. Microsoft typically releases new feature updates as optional updates first, and the ISO files for the latest version are available on the official Microsoft website.
1.Download the Windows 11 25H2 ISO from the Microsoft official site.
2.Mount and run setup.exe to upgrade.
3.Alternatively, join Windows Insider for early access.
4.Be cautious with unsupported hardware; ensure backups are in place.
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To install Windows 11 25H2 on an unsupported PC, first download the Windows 11 ISO from Microsoft's website and create a bootable USB using tools. During installation, bypass hardware checks by pressing Shift + F10 to open Command Prompt, then run regedit to add a new LabConfig key in HKEY_LOCAL_MACHINE\SYSTEM\Setup. Create DWORD values BypassTPMCheck and BypassSecureBootCheck set to 1. Continue with the installation, and post-installation, your PC may be recognized as unsupported.
This method bypasses official requirements but may lead to stability or security issues. Proceed with caution.
To test your app on Windows 11 25H2, you’ll need access to the latest ISO image of that version. As of now, Microsoft typically releases Windows 11 feature updates through Windows Update, but ISO images are also available for download.
Since your machine is not officially supported, installing Windows 11 25H2 on unsupported PC might encounter issues. You might need to bypass certain compatibility checks, similar to your previous registry modifications. For testing purposes, you could also set up a virtual machine (using Hyper-V, VMware, or VirtualBox) with the Windows 11 25H2 ISO, which provides a safer environment for testing.
