To run an old app or game on Windows 11, use your operating system's built-in compatibility mode. To use compatibility mode, right-click your app or game, click "Properties," open the "Compatibility" ...
The latest Windows 11 preview build added a new entry to the list of compatibility blocks. It now includes the SSE4.2 instruction set, preventing very old CPUs from running Windows 11 version 24H2.
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