I have an acer aspire that originally came with windows 8 but I upgraded it to windows 10 when it was free to upgrade. I had windows 10 for around a year and one day i went to use my laptop and it says there is no bootable device. I checked in the BIOS and my HDD is still recognized. I've tried installing windows 10 using a USB installation media tool, but once it booted the blue windows 10 logo showed up, and showed the loading white circles but then the screen went black. I am really not sure what the problem is and going to this website is basically my last resort. If anyone out there knows the solution, please feel free to let me know.