I downloaded the 32-bit upgrade version of Windows 7 Home Premium from the Microsoft Store this evening to install on my iMac currently running OS X Leopard (10.5.8) and Windows XP. I managed to burn the image to a DVD OK but when Windows 7 gets past the Welcome screen, it keeps on coming up with 'A required CD/DVD drive device driver is missing' and won't find anything for me and then I have to exit the setup. I'm really confused because if the drive can read the DVD then surely the device driver is installed? I've tried downloading the 32-bit version again (in-case there was a download problem) and installing it but the same thing happens. I have no reason to believe the download left out some files. Does anyone know how I can get around this, because, at the moment, I've wasted £85 and wish I'd have just bought it in town? Thanks.