[1080jibber]

how do i get into DOS with out going into windows first?

and how do i delete something in DOS?, (do i just type delete and whatever im trying to delete)

and how do i put the old file back from where i deleted the new file (like i put a new file in but it crashed my computer every time on startup, even in safemode so i want to delete the new file and repalce it with the old file that is on my floppy disk)

cant get into my computer i fooked it up real good, and i would have fixed it no porblems at all but im not that good with DOS