| If you get to any part of the installation for either os on cd and you can make a choice then I'd almost think some other part of the system would be suspect. Either MB or ram.|
See barts pe2usb.
See hp for how they make a bootable usb.
Might have to use pxe to install or a networked cd from a working system.
Might be easier to borrow a usb cd/dvd.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10