坑爹的windows：

(setq default-buffer-file-coding-system 'utf-8)
(setq current-language-environment "UTF-8")
(set-language-environment "UTF-8")
(setq default-input-method "chinese-py")
(unless (eq system-type 'windows-nt)
(set-selection-coding-system 'utf-8))
(setq locale-coding-system 'utf-8)
(set-default-coding-systems 'utf-8)
(set-terminal-coding-system 'utf-8)
(set-keyboard-coding-system 'utf-8)
(set-w32-system-coding-system 'utf-8)
(set-file-name-coding-system 'utf-8)
(prefer-coding-system 'utf-8)
;; 支持从外部粘贴中文
;; MS Windows clipboard is UTF-16LE 
(set-clipboard-coding-system 'utf-16le-dos)