The document was accidentally closed and was not saved. My pc windows 10 did not shut down. REALLY IMPORTANT!!!
No chance to get it back. At least, you have learnt how important it is to save documents.
And make regular incremental back-ups (to external sources too).
Or work in a Dropbox folder: http://boblevine.us/why-i-always-save-files-in-dropbox-and-why-you-should-too/
Retrieving data ...