Welcome to Seven forums soulgirl1966
Probably some settings were changed, log in hotmail and do the following:
(1) Click on your name (on the top right corner)
(2) Click on Options
(3) Click on "Pop and deleting downloaded messages"
(4) Check the attached image and select "Don't let another program delete messages from Hotmail. (If your other program is set to "delete messages from the server," we'll simply move them to a special POP folder. They won't be deleted.)" and save changes
Let us know if the problem still persists.