使用了大白菜软件，按option 可以看到启动盘，回车进去以后回出现以下提示
windows failed to start A recent hardware or software change might be the cause.To fix the problem
1.insert your windows installation disc and restart your camputer
2.choose your language settings,and then click "next"
3.click"repair your camputer"
if you do not have this disc,contact your system administrator or computer manufacturer for assistance
File:\windows\system32\boot\winload.efi
info:the application or operating system couldn't be loaded because a required file is missing or contains errors