When I first got my laptop in November, it would regularly come out of sleep mode by itself and give me a black screen with a blue text error box that said: Default Boot Device Missing or Boot Failed. Insert Recovery Media and Hit any Key Then select ‘Boot Manager’ to choose a new Boot Device or to Boot to Boot Recovery Media [OK]. Hitting OK came up with a screen that said there was no boot device. Powering off and on though - the system would reboot fine.
I now find that every few hours the system will give me a screen that says “Windows had a problem and needs to reboot” . That then leads to the same screen as I described above. Once again, I power off and on and everything is OK for another few hours.
I looked at the BIOS settings and they look fine. I opened the laptop and the drive and RAM all seem seated properly. Running Windows 10. Not sure what to try next.