That worked for me too ! I have Windows 10 and Outlook on my computer. On Outlook, I made a right click on the specific file with the clock and chose 'Move to Folder' and I chose the basket. I then immidiately emptied the basket and ... IT IS GONE !!! After more than 2 years, this worked. I checked on the web version of Hotmail ... And the file is no longer :)
THANKS jones223344