When i rec'd my new computer, my brother-in-law had installed 'black XP' onto it, so I do not have any original software CD's. I would like to get rid of the black XP and re-install everything from new using legit s/w. I currently have nothing worth saving on my PC so I'm not worried about losing anything important. How do I go about clearing everything out of the computer so when I put in my new, legit, XP sw CD, so it loads correctly? PS: I had a previous issue where I tried re-loading the black XP CD, and now I have 2 O/S's loaded - one I can access and one I can't. Help! Computer is completely messed!