I have a dell inspiron 15 7000 series note book. I had win 10 installed in it. Due to some reason i planned to reinstall win 10. So i changed the boot setting from UEFI to legacy and then i deleted whole of my hard disk and then i installed win 10. During the installation an error message is shown again and again as " this disk is GPT partitionized. The some how after many tries i completed installing windows. And now when i restarted my lap after changing the boot option again to UEFI it says no boot device found. But win 10 runs when i change the boot option back to legacy. But i want to run windows by keeping the boot option as UEFI. what should i do? Some one please help me
Yes, you can't have your cake and eat it. You either install win10 in bios mode or UEFI mode, after which you can't switch, since bios mode uses MBR (old) and UEFI mode uses GPT (EFI partition).
as the posters say, best (and more modern) bet is to set bios to UEFI and reinstall from scratch