re format again

i have a xps 400 dell,i have a few times reformatted the harddrives but this last time i i really screwed up things,somehow in bios iwhen i had comp. boot from cd i somehow left d drive lost,meaning i didnt know this till after i had reloaded all the drivers and os,but it still worked i also have a tv tuner,my question is how can i redo all of this and fix my scew ups i cant get reformat by c f 11 i think thats what i would do,but tried so many times just cant get it to work,is this a lost cause? out of warranty.

[Moderator]

Can we try again with some punctuation? Maybe it's just me, but I find your post incomprehensible. And why do you keep formatting your drive?

Hmm, so you deleted partition D? I think you have to enter bios again (press f2 or f11 idk when your computer is starting) and make a new partition, with the unused memory. I am not sure exactly how you can do this, because I've done it only one time.