I wanted to try out Windows 11 21H2 October update in VirtualBox but I came short when the installer thought I had unsupported (virtual) hardware.
Googling for a few minutes led me to https://winbuzzer.com/2021/10/07/how-to-install-windows-11-without-tpm-2-xcxwbt/.
In short, when you are about to select your Windows 11 Edition, hit Shift+F10. Type
regedit and hit the enter key.
HKEY_LOCAL_MACHINE\System\Setup. Right click on
Setup and create a new key named
Right click in the emptiness of the right hand panel, create these three DWORDs, and set each of them to 1:
regedit and continue installing Windows 11 as usual.
The addition of the Graphing mode to the builtin Calculator is very neat.