Masking and layers scrambled

[papadiabolous]

Hey,

I was working on a project last week. I saved it and shut down the computer, Windows 10 latest version. When I came back to it, everything masked or patterned was undone, some parts were missing and the layers were completely scrambled. That is bad enough, but the mess had overwritten all the previous iterations of the project, all the way back to the earliest version.
Can this be undone?
How do I prevent it in the future?

Thanks

Logan

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