All of the sub-folders in my Hotmail account had disappeared when I logged in to my Hotmail account. The "Parent" folder is still there but none of the sub-folders nor their contents are available. This happened once before and about 10 days later they reappeared without me taking any action.
How can I recover the lost contents? And how can I avoid this happening again?
I am running my email in Windows Live Mail 2012 on a Windows 7 Pro operating system.