I have an Optiplex GX620 that I'm trying to install Windows 7 Pro 64bit on. I've attempted to do so using a DVD and a flash drive (with the DVD/CD drive completely disconnected. In both cases I get the same error, right after selecting the language etc and clicking install it pops up a box stating that a required DVD/CD driver is missing... which doesn't make a whole lot of sense considering the DVD drive isn't even connected when installing from the flash drive. I have no idea what driver to look for since it clearly isn't the DVD driver. I even tried installing from another, external, DVD drive just to eliminate the possibility of the USB having issues. What can I do to correct this error? Thanks
EDIT: Ended up using the 32bit version instead and it worked great.