someone teach me how to delete with DOS

I can't delete this 700 mb file and I'm really getting frustrated. Can somebody teach me the DOS command of how to delete?

>>3 is right
Also another thing to consider (If you're using NT/2k/XP) is your filesystem. If it's FAT you can get a boot disk from freedos.org (the link to the bootdisk is: http//www.ibiblio.o/... and this is assuming you don't have a copy of DOS already) and boot it. Find the file you want to delete (warning, everything will be in short form, ie LongAssName.avi will be LONGAS~1.AVI) and delete it that way.