Terminal in Emacs in Windows - Error message: "Spawning child process; invalid argument"

The following should do:

• M-:(make-comint-in-buffer "cmd" nil "cmd" nil)

• M-xeshell

• M-xshell

All have both their pros and cons. So choose what suits you best.

I got the same error while trying to run M-x compile. I added the following to my .emacs file and it fixed the problem:

;; Make sure that the bash executable can be found
(setq explicit-shell-file-name "C:/cygwin/bin/bash.exe")
(setq shell-file-name explicit-shell-file-name)
(add-to-list 'exec-path "C:/cygwin/bin")

Obviously this solution will only work if you have Cygwin installed, but if you are running Emacs on Windows it is usually worth at least a minimal install of Cygwin because many Emacs commands can leverage the command-line tools made available by cygwin (M-x compile in my case).

Had the same problem.

I ran procmon and discovered that Emacs wants to find c:\bin\sh in some form (sh.exe, sh.bat, sh.cmd, etc).
Since I happened to want to use term mode with the android debugging shell, I created c:\bin\sh.bat with contents "adb shell", and it worked fine, albeit with some weird input lag.