Booting problem

[primal lake]

The first pic is the display which up after I turn on my pc then regardless of which option I chose the display in the second pic shows up . What should I do ?

Also if I keep the first menu open for few mins the second display pops up

[leaden girder]

it starts first option on a timer

anyway, boot the live usb with linux mint, and see if your internal drive got blown-away or somethng

use the Disks app, or gparted

to investigate