The issue of compatibility centers around the POPCNT CPU function. TheBobPony’s posts on Twitter uncovered that this function is found in several Windows 11 system files, including the kernel and USB XHCI drivers. This implies that any CPU incapable of executing this function will be unable to initialize Windows 11. POPCNT was initially incorporated into AMD’s Barcelona architecture in 2007 and Intel’s Core processors in 2008. It’s a function utilized for calculating set bits in a word.
Consequently, older CPUs won’t be able to operate the newest iteration of Windows 11. This could be attributed to Microsoft engineers integrating more contemporary CPU functions during the compilation process. Nevertheless, given that the affected hardware is over 15 years old, it’s probable that Microsoft is inclined to exclude these systems from utilizing the most recent editions of its primary operating system. This issue has been a topic of discussion in the past as well.
If you have older hardware, it’s recommended to vigilantly monitor Windows updates. Share your perspectives in the comments if this applies to you.
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