Although you said there were no Windows issues, you did do a restore, so I’m guessing something went awry.

I don’t think the restore process will overwrite your data files.

I would guess that whatever the cause of your windows problem was, may be the same culprit with NV. Have you checked on whether you may have hardware problems? Flaky memory or a failing HD? Power supplies and fans can create heat and power problems.

Good luck,