So i have and old emachine d520 with windows vista , but it gives me the erro "Ntldr missing , press ctrl+alt+spr to restart" , i checked the bios, changed the boot order, restored to default and nothing. Also tried installing another windows (xp, vista,7,10) wit no succes , with windows xp nothing boots, with windows vista and 7 it gets sutck on black screen and cursor, and with windows 10 it gets stuck on logo. So i can't even install windows, any idea why?