Neowin has a straight forward article for checking your CPU on older machines and those running on unsupported hardware, for the upcoming Windows 11 update to 24H2.
https://www.neowin.net/news/how-to-check-if-your-old-computer-can-run-windows-11-version-24h2/
Noted from the article for unsupported hardware:
The recent Windows 11 preview builds reportedly contain a change in the required CPU instruction set, which rendered already unsupported processors physically incapable of running Windows 11 version 24H2, with the operating system simply crashing on boot. If you have an old, unsupported computer that runs Windows 11 and you plan to upgrade it to version 24H2, here is how to check if that old timer has what it takes.
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Checking the compatibility of older CPUs for Windows 11 24H2 involves a few steps.
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Check Microsoft's Official Requirements: Start by referring to Microsoft's official documentation outlining the system requirements for Windows 11 24H2. Microsoft provides a list of compatible CPUs. Compare the model of your older CPU against this list to see if it meets the requirements.
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Use Microsoft's PC Health Check Tool: Microsoft offers a PC Health Check tool specifically designed to assess whether your system meets the requirements for Windows 11. Download and run this tool on your system to check compatibility. It will provide information about whether your CPU is supported.
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Consult CPU Manufacturer's Specifications: If you have the specific model of your CPU, you can check the manufacturer's specifications. Visit the manufacturer's website and look for information regarding the CPU's instruction set, TPM support, and other relevant features required for Windows 11 compatibility.
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Search Community Forums and Resources: Sometimes, the compatibility of older CPUs with newer operating systems like Windows 11 is discussed extensively in community forums and tech websites. Search for your CPU model along with "Windows 11 compatibility" to see if others have tested it or found workarounds.
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Consider Workarounds and Updates: In some cases, even if your CPU isn't officially supported, there might be workarounds or updates that enable Windows 11 to run on older hardware. Keep an eye on community discussions for any unofficial patches or modifications that may help.
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Upgrade Hardware if Necessary: If your CPU isn't compatible and there are no viable workarounds, you might need to consider upgrading your hardware. This could involve replacing the CPU with a compatible one or investing in a new system altogether.
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Participate in Community Discussions: Lastly, don't hesitate to participate in discussions within the community forum. Share your findings, ask questions, and collaborate with others who might be in a similar situation. Together, you can navigate compatibility issues and find solutions.
if you're referring to software or hardware that converts media files from one format to another, it's important to note that the compatibility of such tools with Windows 11 24H2 should generally not be impacted by the CPU compatibility issue. Media converters primarily rely on software compatibility rather than CPU architecture.
Feel free to share your experiences or additional tips for checking CPU compatibility with Windows 11 24H2. Let's collaborate to ensure everyone has the information they need to make informed decisions about upgrading to Windows 11.