ok I realllllllllllllllllllllllllllllllllllllllllly F******cked up I am fixing a computer for my nighbor and I messesd up I know that this isnt security related but i need answers fast (please dont move to other forum)

Ok i had two os liines in my boot.ini and only one installed os so i edited the boot.ini but instead of erasing one i erased both now there is a black blank screen when i boot my computer.

What do i do please help

help
help
help


please help or im screwed