I own compaqs computer n friend administer it to me tryin to refomat it?

i enjoy the XP CD n go i put it in it start downloading fil or something idk what it do n it relate me pick a hard drive i own 2 a HP hard drive near 79 GB and 19 gb and went i try detele the sceen turn blue and show me something idk what miserable and i try again n do it again everytime i try to detele the hard drive

anyone oblige

I own compaqs computer n friend administer it to me tryin to refomat it?

You probably have 2 partition and one is the backup! Boot up pressing the f10 key and simply restore the original! Leave the backup alone!