Do you have the latest BIOS update?
There was a BIOS released this month http://usa.asus.com/Motherboards/Intel_Socket_1155/P8P67/#download
If that doesn't work, you can always create a USB Windows 7 Installation Disk by using your Windows CD on a different system. Then you can boot to the thumbdrive to perform the installation (if you think it's caused by the DVD drive) http://www.microsoftstore.com/store/msstore/html/pbPage.Help_Win7_usbdvd_dwnTool
Thank you for your response.
The latest BIOS release (2001) is already installed.
Interestingly, I have been told that BIOS 1606 did not show this problem because it had Intel OPROM 10.1.0.1008. However, BIOS 2001 uses Intel OPROM 10.5.0.1034 which, again I am told, actually causes this problem. I was hoping that someone on these Forum's could confirm whether this is true?
In the meantime, I shall try your kind suggestion. However, not having a functioning DVD at boot is a serious restriction which I should not just accept!
I have now done as you suggested and have now installed Windows 7 64 bit. That is the good news.
After a while the operating system reported that Windows 7 update had a set of updates (there were about 60!) amongst which were firmware updates for my Canon printer etc. I am informed that these updates should be saved to a DVD and then installed during the boot process!! Oh no - not another problem. I am now checking with the manufacturers to see if I can use some other method since my DVD does not work at boot.
I also use Acronis to create backups for my system. Guess what.......I need to use their DVD to create/restore backups at boot. I am now talking to Acronis to see if their is a solution to this too.
In essence the workaround that you kindly provided has worked but not having a working DVD at boot is terribly restrictive.
Thatk you for your advice.