现在新出厂预装win10的电脑默认采用新型的UEFI启动方式,同时硬盘分区表为GPT格式,有些用户想把win10改成win7,但是发现不能识别启动盘,或者无法安装,这是因为预装win10电脑默认开启了安全启动,只有win8以上版本的系统才可以验证通过。
重启电脑时不停按F2进入BIOS,转到“Security”,选择Secure Boot Control回车,改成Disabled;
接着转到“Boot”,选择Launch CSM回车,改成Enabled,按F10保存重启;
插入U盘PE启动盘,重启按ESC选择U盘启动,打开分区工具,把硬盘改成MBR格式。
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