Ok I have been working on this computer for weeks but it just won't load correctly. The computer is a very old HP 551w desktop 1.5gb ddr ram not sure about processor. I added a cd drive because the original wouldn't open. I tried to reinstall xp home using disc to a different hp pc but when it gets to the part after it formats the new partition it is supposed to restart and finish installing xp. It doesn't restart correctly the fans will still be running in the pc and the disc drive will still be spinning but the front led blinks green for about 2 or 3 minute and then restarts and the bios won't recognize the cd drive to even finish the install. So I have to take the hard drive out and format it in a different pc to get rid of errors. I have reinstalled xp on the same hard drive in a different pc and had no problems at all. So far I have tried reseating the ram chips, removing cmos battery to reset bios settings. Why won't the pc restart correctly during the installation? Any other tricks I could try? Any help will be greatly appreciated. Thank you.