I have just started to use a new Windows 10 PC.  Everything transferred over from the old PC without too much problem.  I continued to use Live Mail as my main email means.  Last night I discovered that my contact list had disappeared.  I cannot even create a new contact.  If I send an email I can still access the drop down listing from the "To", "CC" & "BCC" areas but there is nothing visible in the former contact list.  I note that others have had similar problems but I cannot see any resolution having been found.

Can anyone help please?