There can be problems or misunderstandings when using the testing tool:
https://learn.microsoft.com/en-us/answers/questions/566238/pc-health-check-shows-incorrect-results-win-11-upd.html?childToView=566343#answer-566343
Today is September 26, 2021 and Windows 11 is scheduled to be released on October 5.
At this time you can compare the current computer's hardware and software specifications to what is displayed on this link:
https://www.microsoft.com/en-in/windows/windows-11
https://aka.ms/GetPCHealthCheckApp
Then you can decide whether you want to attempt upgrading.
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