#1 with a bullet – open any explorer window and under ‘tools’ select “folder options” on the 2nd tab “VIEW”. Be SURE that the check mark for ‘check network folders and printers’ is REMOVED. This well intended but dangerous choice has XP check every printer connection and currently (or previously) mapped network drive for every open, save, print, explore command. This behavior is the default and can cause real slow operations depending on network size. It is a lot like the ‘cache setting’ in IE if you set cache to check the page every time, it looks every time you start IE, NOT every time you enter that URL.