System - laptop (2013) dell inspiration. 

When i tried to install 2 operating system (windows) and (prime os) and i also separated 1 local disk to 2 parts and after that it says no boot device found.

Boot mode is set to legacy 

I have 2 operating system but i can only open from UEFI BooT

But it says  no boot device found .

I need a password to change boot manager

I don't know why it asks for (enter current password) which password it asking i  dont know.while changing boot mode