Can you write a no-deps, kernel-only, windows program?
Start with a simple "Hello world" (written in a file), C console application, HelloCLib.
Step 1: remove all dependencies on the CRT (C Runtime library/DLL), use only Win32 functions: HelloWin32
Step 2: remove dependencies on kernel32 etc., and use only the Native API (ntdll.dll) HelloNative
Step 3: remove dependency on ntdll, trap directly into the kernel (ntoskrln): HelloKernel