I am new here and not very knowledgable about the operating system of my computer, tweeking the BIOS and getting the bugs out. I built my new system with help from a distant son. His old ASUS motherboard and processer, some of my old stuff and a new 80G sata hard drive. I don't know how to assign priority to my hard drives but have Windows XP Pro (Old Version) loaded on the Sata drive (F. The computer seems to work well until you are on line (I live in the woods of Minnesota and can only connect on a dial-up modem with transfer rates about the same as smoke signals) and then if I open another application after some short period of time the whole system goes through a reboot. Every time I start my computer I get the "Your computer has recovered from a serious error" message and something about BCCode 12. HELP!