Do you mean that your computer shuts down and restarts ?
If yes, it's been a very long while since I use Windows (maybe it's no longer the case). But you don't have any message when windows restart to notice you that you didn't shut down your computer correctly ?
In any case, make sure that you tried all of these steps at first (and after, maybe also send a ticket to the support for help > "Contact Us" button).
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