error loading windows 7

I have compaq laptop with vista basic want to load windows 7 in D drive, I downloaded windows 7 and burned to a dvd at 2 X speed wiith power iso. The DVD loads correctly but I get the following error message "load driver - A reqd CD/DVD driver device is missing. if you have driver floppy disk CD/DVD/usb please insert it now, Note If the windows installation media in the CD/DVD drive you can safely remove it for this step.

No device driver found

To install windows you must run windows installtion"""

After which it does not go any further. I have tried to and burned at least 4 to 5 dvd without any success. Kindly help. RSG

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