I am in troubleshoot of installing windows 7 that at the installing period there was 4 drive in my hard disk but during the installation the four drive seems to broken in one drive. I tried to make partition but didn’t work. A message show that “ A required CD/DVD drive device is missing. if you have a driver floppy disk, CD, DVD or usb flesh drive, please insert it now” I don’t know what is the driver floppy? Help me….. Thanks.