戴尔电脑重装进BIOS找不到U盘驱动解决办法1.secureboot改成disable然后applly2.security里的PPT对勾去掉然后applly3.general里的advancedboot对勾打上然后applly,bootsequence里选成legacy然后applly4.systemconfiguration里的sataoperation改成ahci然后apply