There are a dozens of links in the web for setting up erlang as an emacs IDE with syntax highlighting, indentation, compilation , debugging support. However, none of them is as straight forward as this one HERE. However, this was written for linux boxes. You can replace the linux relative paths with your windows relative paths. Just keep the following points in mind.

• Erlang default installation path “C:\Program Files\erl5.6.3” is not supported by Distel (because of the whitespace in ‘Program Files’). You can either install erlang in a different location (C:\erl5.6.3), or use shortcut path location : “C:/progra~1/erl5.6.3”
• You don’t have to checkout the distel code with svn if you don’t have svn client. You can download it directly from HERE.

Just in case, I am pasting my .emacs file here

;; This is needed for Erlang mode setup
(setq erlang-root-dir "c:/progra~1/")
(setq load-path (cons "C:/progra~1/erl5.6.3/lib/tools-2.6.1/emacs" load-path))
(setq exec-path (cons "c:/progra~1/erl5.6.3/bin" exec-path))
(require 'erlang-start)

;; This is needed for Distel setup
(let ((distel-dir "C:/dev/erlang/distel/elisp"))
  (unless (member distel-dir load-path)
    ;; Add distel-dir to the end of load-path
    (setq load-path (append load-path (list distel-dir)))))

(require 'distel)
(distel-setup)

;; Some Erlang customizations
(add-hook 'erlang-mode-hook
	  (lambda ()
	    ;; when starting an Erlang shell in Emacs, default in the node name
	    (setq inferior-erlang-machine-options '("-sname" "emacs"))
	    ;; add Erlang functions to an imenu menu
	    (imenu-add-to-menubar "imenu")))

;; A number of the erlang-extended-mode key bindings are useful in the shell too
(defconst distel-shell-keys
  '(("\C-\M-i"   erl-complete)
    ("\M-?"      erl-complete)
    ("\M-."      erl-find-source-under-point)
    ("\M-,"      erl-find-source-unwind)
    ("\M-*"      erl-find-source-unwind)
    )
  "Additional keys to bind when in Erlang shell.")

(add-hook 'erlang-shell-mode-hook
	  (lambda ()
	    ;; add some Distel bindings to the Erlang shell
	    (dolist (spec distel-shell-keys)
	      (define-key erlang-shell-mode-map (car spec) (cadr spec)))))