My OS is Windows XP Prof' as an upgrade from 98SE.On 3 separate occasions,while working in spreadsheet or word I have suddenly,for no apparent reason, been presented with the message "The address book failed to load.OE is incorrectly configured,please re-install". If I then open Outlook Express and click on "Create Mail" I get the message "There was an error opening the message.An error has occurred".Furthermore,if I then click on Address Book I get the message "Unable to open address book.The address book may not be properly installed". To correct this anomaly I have to re-install Windows XP each time. My spyware and virus programmes do not show any problems. Can anyone tell me why my system keeps doing this?