help me out guys... i burnt win7 x86 OEM ultimate on dvd. when i try to install it ..it gives me this message. a required cd/dvd drive device driver is missing. if you have a disk ,cd,dvd,usb flash drive insert it. if the window installation media is in the cd/dvd/drive you can safely remove it for this step. i am stuck how can i go about and install the above said win7? presently i have 6.1 build 7600 running on my laptop. any help will be appreciated.