ok, so first it started off with my power supply screwing up and I replaced it along with my motherboard, it was acting up too. After installing a new mobo and a psu, i formatted my hard drive on another computer, and it worked just fine but when i installed it onto the one that was just upgraded, the big windows xp logo and the loading bar wont come up and the whole thing just freezes. I was told that the alignment of flat wires that connect the floppy, hard drive, etc. to the motherboard and the reset, power switch, hdd led plugs, etc was important, and I really had some hard time figuring them out...did alot of research and still cant get it to work..