disable ido caching for problem directories on windows

;;disable ido caching for problem directories on windows
(require 'ido)
(when (equal system-type 'windows-nt)
  (setq ido-max-dir-file-cache 0)
  (add-to-list 'ido-work-directory-list-ignore-regexps
           "Local Settings")
  (add-to-list 'ido-work-directory-list-ignore-regexps
           "Application Data"))

                    ; caching unreliable