About a minute after turning my computer on, it just shows a blue screen saying "Your PC encountered a problem and needs to restart". Then it either restarts, or more often, comes up with the message "Boot Device Not Found. Please install an operating system on your hard disk." (an HP message).
I don't have enough time to troubleshoot the problem as this happens over and over with only a minute or so with Windows booted up.
This has happened before but just went away. What caused the problem is unclear as I hadn't recently made any system changes (e.g. installing software).
Hardware and system info:
- Windows 10
- HP Envy laptop
- Dual boot with Ubuntu 14.04
- Ubuntu 16.04 subsystem installed
- Norton antivirus running
Please let me know in the comments if you need any more info. Thanks for your time!