what is this file? i have an hp, and it will not boot up. i keep getting an error saying that file is missing or corrupt. its os is vista. i was told it was the HD so i just went and bought a 1tb hd, and i'm still getting the same error.

i try to get it to boot from disk and re do the whole cp, but it still gives me that same error. what could be the problem, what do i have to change, do, or go buy now?

Thanks.