Windows 7 Home Premium Disc Won't Boot

Potatooo

Prominent
Mar 16, 2017
1
0
510
When I try to boot it, it just says 'BOOTMGR IS MISSING. PRESS CTRL+ALT+DEL TO RESTART'.
I have tried everything, using flash drives, checking BIOS making sure that it's on CDROM. I can't seem to find the right thread related to this. Any solutions?