-can stop Emacs by typing C-z at the GDB job.) Then try stepping with
-`step'. If Emacs is hung, the `step' command won't return. If it is
-looping, `step' will return.
+can stop Emacs by typing C-z at the GDB job. On MS-Windows, run Emacs
+as usual, and then attach GDB to it -- that will usually interrupt
+whatever Emacs is doing and let you perform the steps described
+below.)
+
+Then try stepping with `step'. If Emacs is hung, the `step' command
+won't return. If it is looping, `step' will return.