电脑开机提示“an operating system wasn't found”怎么解决？

 

 

 

电脑开机提示“an operating system wasn't found”怎么解决？_电脑故障-装机之家 (lotpc.com)

黑屏出现An operating system wasn't found.解决方案 - 知乎 (zhihu.com)