What’s inside a .EXE File?

What is inside the Windows Executable or the executables for other operating systems? I take a look at the past from the days of DOS until the present and crack open a few EXE files to get a look inside. Explored also is programming without a compiler, linker, or any kind of processing code before execution. Is programming in raw machine code possible? Altair 8800 Demonstration: Learning x64 Assembly: kernel32 lib: kernel32 and kernel64 are the same thing. Windows 1.0 online: