Forum Discussion
Stegurus69
Jul 31, 2025Iron Contributor
How to fix This PC's processor doesn't support a critical feature SSE4.2?
Hi all, It is quite frustrating to get Windows 11 installed on my old Windows 10 laptop. I downloaded the Windows 11 ISO, mount it and run the setup.exe to in-place upgrade Windows 11 to Windows 10 ...
Hunter226
Sep 24, 2025Iron Contributor
I know how to do this as I had the same issue two weeks ago. Here is a simple guide:
https://www.wizzgear.com/processor-doesnt-support-a-critical-feature