Hi! I Bought New Hard Drive Western Digital 1Tb WD10EARS Green Caviar My Old Hard Disk is 160GB WD1600AABS Caviar When I put my new drive and try to install Windows it shut down down when the Windows loading files even when i leave the pc without doing anything it shut down too, My Pc Is 2GB DDR3 ram 8600GT Video card. Main board gigabyte GA-P41T-ES3G. I Tried To change the power Supply and the same problem. why i want help please???