当电脑开机显示Error loading OS时，别慌。可尝试进入BIOS检查启动项设置，确认系统盘是否识别正常，必要时通过系统修复工具 ...

It is still true that you want to install older Windows operating systems first, then later ones. In order to get around this in your situation, you could use the Easy BCD boot loader app. Put it on ...