Hi, For the past 4 days i have been trying to resolve the issue of my custom built system rebooting at random intervals. I have had one too many minidumps and when i looked at them i was not sure what the issue is. Before all of this my system was running fine since December of 2005. Here are my specs below: Win XP Pro SP2 AMD Athlon 64 X2 3800+ Manchester 2.0GHz Socket 939 CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) GIGABYTE GA-K8N Pro-SLI Socket 939 NVIDIA nForce4 SLI ATX AMD Motherboard with 1394b 2 POWERCOLOR R43CA-GD3D Radeon X800GT 256MB GDDR3 PCI Express x16 Video Cards An extra PCI ATA adapter (total of 4 HD drives connected) -Initially I scoured through this forum, was able to read my minidumps. Ran Memtest86+ overnight (13 hours), no errors. -Reinstalled XP Pro Sp2 on a seperate drive, now it hangs at Bootup. I have attached my minidumps BEFORE i reinstalled XP Pro sp2.