http://www.dowdandassociates.com/blog/content/howto-repair-windows-7-install-after-replacing-motherboard/ Successfully replaced an AMD 760G motherboard with a nForce 630a chipset motherboard without having to reinstall Win 7 Ultimate x64 after following these directions. A menu offering to launch the startup repair tools will appear after Windows fails to boot, or can be accessed through the F8 screen before Windows boots.