Hi Marcel,

WSL = Windows Subsystem for Linux?
https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux

Exactly. :-)

I tried installing Cygwin now, too, but I still do not succeed.
I ran scripts/installCygwin.bat, then started a Cygwin session and ran the mvm script from there. But still, Windows.h is not found. Is this what I am supposed to do?

However, I tried MSVC, too (this would be my preferred way over Cygwin). So, again strictly following the HowToBuild file, I opened an x86 Native Tools Command Prompt, navigated to build.win32x86\squeak.cog.spur\, executed ..\common\SETPATH.BAT and finally ..\common\MAKEDEBUG.BAT. Now guess what type LOGD will give me?

../../platforms/win32/vm/sqWin32Utils.c:11:10: fatal error: Windows.h: No such file or directory

So I guess the HowToBuild instructions much miss some significant point on how to these headers ... :-(