So I got a new computer from my church pastor, he said it was from honduras so it had a bunch of fans in it windows xp standard ram of 256, raedon family card agp, and amd antholon proccessor overclocked to almost 1.48. So I pick it up take it home plug it in and start her up, well right away I noticed something wasn't right because of the press 10 seconds to cancel screen was a smaller font and said something a little different, so I'm like whatever adn i go to the startup screen and its in nt mode so I switch to xp mode and its missing explorer and all the standard apps that come with windows xp sp2. Also I cannot delete crap period, the compute has about 4 gig left after i delete everything possible but 6 windows things which say they can't be deleted, so my question is
 
A. Is there anyway I can free up Space on it?
B. Is it possible to remove the bootlegged version of windows xp ... and if there is how?