Well, i came back from abroad and bought a new dvd writer, memory and a new hard disk. I had to format my computer in order to make my computer into RAID 0 configuration so first i installed all my new hardware and then formatted my computer. After the format i installed all my softwares, games and peripherals (even the new ones; logitech webcam orbit & sandisk 12 in 1 media card reader). Then suddenly my computer started restarting and getting these errors. Is it possible that i'm overusing the power supply. I got a 3.00 Ghz processor wit HT, 2 GB Ram (4x512MB), 4 optical drives; Dvd-rom, Cd-writer, 2 Dvd-writers and now two hard disks connected and i have a 480W power supply.