Jon Freeman wrote: Did you mean TPM 2.0 rather than 2.1 above, Dave.

That puzzled me! A sans font and proportional spacing probably contributed to your question ;)

I've looked into it further. It seems MS are saying you need an 8th Generation processor to run Windows 11. Who on earth knows what generation their processor is? Anyway after a lot googling I discovered that the Thinkpad is 3rd Generation and that 8th Generation CPUs were introduced in 2017; see here. As Richard said, that requirement might be relaxed (I think they might drop it to 7th gen, which was the first processor that only supports Win 10) but I don't see the requirement for TPM 2 changing.

I think this new version of Windows is mainly driven by Microsoft's strategy of converging traditional desktops/laptops and touch/mobile devices. Also, I suspect, to simplify the code by dropping stuff inherited from earlier versions - like 32-bit processors. (Though it'll still run 32-bit programs, so Simple Piano should still work :)