On a completely clean system, I tried booting Windows 7 x64 for the first time on a brand new system. The first boot was slow, yet finally started and failed after only like 2% of the install files loaded. Then when I tried to restart the installation, the boot yielded "BOOTMGR is missing", despite having the Windows 7 DVD in and having it work just prior to this boot! Restarting the boot yielded the same result numerous times.
Any help is very much appreciated. Thank you in advance.