Why do I get an Unsupported 16-bit Application error on Windows 11/10? Windows 11 comes with only 64-bit and cannot support 16-bit.

This Python install tutorial shows how to download and install Python 3.13 on a Windows 11 computer and run a Hello World Python program.

64-bit apps on Windows on Arm are a work in progress: some are native, many work well with the new 64-bit emulation, but others will have to wait for more support in insider builds of Windows.