Since 01/22/2016 we have used our Windows 10 All In One Desktop Windows Live Mail Calendar to enter Medical appointments, Family Data and Other Personal and Travel Information to have both a record and to remind us as well as not to double-book on any date.  These entries were and are vital to us and on Monday, 09/23, all entries for all years just vanished and no new entries can be made.  We hope this is a new question and not a duplicate.  We would appreciate any help in "getting our calendar life back".  Thank you/////CKM