Bernard hasn't turned on his old HP Windows computer since January and when he did, he got a ton of updates. But now he can't update any further because there's no room. Looking deeper, most of the room is under the "other users" category. They won't let him delete it. Leo says to try logging out and see what other users are listed. Leo says that older versions of windows are probably what's taking up all that space. There is the old utility called "Disk Cleanup," which will delete it for you. Windows key, type "disc clean up." You can also delete old media like podcasts.
You can also search for "windows.old" and delete it directly.
Here's a good tech note on it from HP - https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Hard-Drive-Storage-Full-and-Being-taken-up-by-quot-Other/td-p/6966280