I wish I could help, but it doesn’t look as though Windows keeps previous versions of savegames by default. I’m sure this must have been mentioned by others before, but it would be so much better if each new character created had their own save game folder (without needing to create separate profiles). I know that doesn’t help you though

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Hope someone more PC-savvy has a suggestion.
EDIT: I just looked into this a bit further, and if you have OneDrive sync turned on and look at the files there then there are at least some historic versions of the auto and quick save files that can be found and restored. Not something I’ve ever played around with though, I’m afraid. (I’m assuming you’re on Windows from your mention of PC, so hope this is relevant.)