It is necessary to return the UEFI settings to default (C2D6). The tablet is not loaded, the screen does not work. Change settings in the UEFI have been made child. He says he saw the 4 lines in a boot priority: Android, Windows, Android, Android. He thought that the last two are not necessary and disabled it. If I try to enter the Bios (Power+Volume), heard only a very quiet buzzer sounds. What to do?