推荐回答（3个）
一：快捷启动U盘：
1.打开戴尔Dell电脑，进入到标志画面，按键盘上方的F12键，进入到快捷启动菜单。
2.进入到快捷启动菜单后，选择USB Storage Device.
二：传统方法设置戴尔从U盘启动：
1.开机进入到标志画面，按下键盘左上角的F2键，进入到BIOS界面。
2.进入BIOS。
3.通过左右方向键，选择Boot。从U盘启动，选择USB Storage Device。按F10键进行保存并退出，重启电脑就可以从U盘启动。
BIOS是英文"Basic Input Output System"的缩略词，直译过来后中文名称就是"基本输入输出系统"。在IBM PC兼容系统上，是一种业界标准的固件接口
戴尔笔记本bios设置: U盘启动:
1、开机: F12 点按几下直到出现BIOS.
2、点击"BIOS SETUP”;
3、选择:左侧:"Update Recovery" ;
4、看右侧: BIOS Recovery from Hard Drive" (从硬盘回复BIOS) ，中-句: "When Disabled is selected, BIOS firmware
update procedure does not store the recovery file on the user primary hard drive. BIOS Recoveryis only vailable via the
external USB key using on- demand process." (选择禁用时， 不能在主硬盘中更新BIOS固件和恢复文件,只能通过外部的USB更新
) ;意思是:关闭后才可以使用U盘启动。操作:关闭下面的按钮(灰色)。
5、点击应用程序更改: "APPLYCHANGES” ,提示框问你是否保存设置?选择上,点击确定。
6、退出:选择:“EXIT”关机。
7、开机F12,点按进入BIOS,看见你的U盘,点击它，就是U盘启动。可以直接装系统或者进入PE系统。
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