like dai said, please start your own thread if you have a problem. now on to your problem. i recommend testing another spare power supply on your computer. if you dont have a spare, then just go to your local computer store and purchase a good quality power supply such as antec or enermax.
test it on your system and if your problem disappears, its the power supply. also you can try taking out all of the computer components out of the case and only reseat the power supply, motherboard, cpu, ram, and videocard. turn on your computer and see if your computer still freezes.