Ok I have succesfully built my first computer. Only prob I came across was the graphics card did not fit. But I fixed that by buying another card. It has 1024 mb ram, 6600gt Nvidia card. 6 fans. No o/s. AMD chip. My computer hp computer that I am using now that I bought at a regular store had windows xp already installed but It came with a dvd cd back up cd. If I were to put that dvd back up cd into the cd/dvd rom of my built computer will it install it? I just want to test it to see if it works and then clear the built computers hardrive of xp.