Hey Guys Have a Big Problem..Actually i Have Win7 Ultimate 32bit OS..To Upgrade 32bit to 64bit i did a Clean Reinstall..But Now I have Two Win7 in My pc..After turn on it shows two Win7..One 64bit n Another the old one 32bit..How can i delete the old one..??Plz help me..I'm trying to format the old one But It Shows "Windows was Unable to Complete this format"