The User-Agent request header hasn't been a good way to detect a user's OS in quite some time, and now Windows 11 will detect as Windows 10. Instead, if you need to detect a user's OS, you can use new User-Agent Client Hints request headers.
https://docs.microsoft.com/en-us/micros ... tect-win11
The User-Agent request header and Windows 11
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Albert Wiersch
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The User-Agent request header and Windows 11
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