hello. i have dell studio 1458.320gb hdd. i always install win 7 on my laptop with bootable usb. but this time after formatting c drive when i pressed "next" to continue setup i got this message. "unable to create new system partition or locate existing system partition .please see setup log for more info." i deleted c drive created it again but no luck.i have c drive of 35 gb and 2nd partition of 264 gb but i cant delete 2nd partition because i dont have anything to backup all my data,.. now that i formatted my c drive i cant do anything .my dvd drive is not working so i have no option but to use bootable usb. so help me!!!!!.