How do I recover my Requirements Specification from the previously saved copy ?

[grahambl]

I was entering my Requirements Specification, and because I had not finished, I saved the current text. When I went back to it this morning, it was gone. My laptop had restarted overnight with a Windows 10 update, and had reloaded all my open web pages. What I  was hoping, is that there is a way to recover my Req Spec. from the saved copy.