Tested and Tried Solution: i was shown this by a Microsoft technician.
Do this. I got all my documents. What happened was that during update 1809, the documents got saved elsewhere. Dont panic!
You don’t need internet for this.
Open, My Computer/File Explorer (it is a yellow folder in the taskbar or PC desktop screen) > This PC (on left hand side) > C: Disk > User > look for username you used for Microsoft eg your name > Document > your Ms Word docs are here. If not, open others eg Temp.
Then, copy and paste Document file from ‘User’ to ‘This PC’ > Documents (on left hand side.) I repeat copy and paste and not transfer as you may end up removing document file and saving it in the wrong place and then lose it completely!