i'm working on a friends computer, window's 98 and it won't boot up at all. He doesn't have a boot disk or backup disk or system disk. I tried to use dos and use fdisk but it says it doesn't have one so i can't try to partion. so i put his other hard drive in that has window's xp home edition on it, it acts like it wants to boot up, but keeps restarting the computer, could the power supply be to small for the xp hard drive or could it be something else. please help if you can. his power supply is 250 do i need a bigger power supply.