I just built a new computer, using the old hard drive from my old system. I think it was a Maxtor, 130GB, with 2 partitions on it. I purchased a AMD 5600+ Dual-core processor, not overclocked. For memory, it's a PC 800 2GB Single-channel memory DDR2. I already know that I have to do a reinstallation of Windows XP (I'm using the old, original disk--no service pack updates). When I start the installation, on the blue screen, after it says on the bottom "Windows is starting setup", an error screen appears and says: "STOP:0x0000007E pci.sys--Address F748E08F base at F7487000, DateStamp 3b7d855c" BIOS recognizes the hard drive as well. I've tried going into Safe Mode, using the Windows XP installation on the hard drive, but same problem--after it reaches "MUP.sys", the computer restarts. I'm thinking that maybe I need a dual-channel memory; would that be the problem? My mother board is ASUS M3N78-VM. Any help or solutions appreciated.