三星笔记本默认安装的是Winodws8.1系统,当其安装Win7系统后开机会出现提示“all boot options are tried”。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/43a7d933c895d1437e24dcc378f082025baf07fb?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
开机时进入BIOS选项,将“Secure Boot”更改为“Off模式”,将“OS Mode Selection”更改为“UEFI CSM OS模式”,设置完毕后更改U盘为“第一启动项”。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8601a18b87d6277f60270ad823381f30e924fc1d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
插入启动U盘,开机后会进入U盘的PE系统。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/38dbb6fd5266d016cda9a5c89c2bd40734fa3599?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
在PE系统中将磁盘中的重要数据备份到U盘或移动硬盘,将系统磁盘全部格式化,在进行重新分区操作时必须选择“重建MBR”,在PE环境下完成系统的安装。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/4afbfbedab64034fa409f9e6a4c379310b551d0d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
重新启动电脑后即可正常进入系统。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/472309f79052982256890323dcca7bcb0b46d493?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)