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I'm upgraded window 10 Window 11 25H2 unsported hardware but can not activate window with old product key (early Install window activate key).
Install Windows 11 25H2 on unsupported PC?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 63%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EE%3C/text%3E%3C/svg%3E)
EmilyCow
5
Reputation points
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.
Windows for home | Windows 11 | Install and upgrade
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Jesster (jzchen) 0 Reputation points2025-11-08T16:21:04.5133333+00:00 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)?
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Jesster (jzchen) 0 Reputation points
2025-12-05T16:56:15.8833333+00:00 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
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