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如何从CD中启动计算机

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恢复或升级计算机时，有时候需要直接读取CD的数据。问题是，大部分计算机会自动读取硬盘上的数据。从CD读取数据开机听上去有些复杂，你将在本文中找到正确的方法。

方法 1

方法 1 的 2:

适用非Mac OS X 系统

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光盘必须是windows系统安装检测的启动盘
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2
重启计算机。 在你插入光盘前，你要确认CD/DVD驱动是默认的启动设备。
- 显示器上出现制造上图标时，图标下方或是旁边或显示相应选择菜单。你需要点击相应按键才能进入BIOS安装菜单，不同的电脑制造商按键不同，常见的有F2,F10,F12, DEL。
  
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- 进入BIOS后，选择"BOOT"子菜单。由于BIOS的菜单排列可能因品牌不尽相同，你可能需要选择与BOOT（启动）最接近的那个菜单即可。
  
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- 进入BOOT后，用上下按键将"1st device"改成"CD/DVD"。不同BIOS可能有不同的表示方法，有的显示的是CD/DVD驱动的厂商名，有的显示的是"Optical Drive"，有的直接显示"CD/DVD"。
  
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- 这样你的默认启动设备更改为CD/DVD，之后重启电脑即可。
  
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当显示器画面出现制造商的logo时，按下任意键系统就读取光盘数据开机，部分光盘会自动进行读取进程。

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方法 2

方法 2 的 2:

适用Mac OS X系统

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你的光盘必须是Mac OS X系统的装机光盘，然后重启电脑。
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2
长按C键或option键。 在你听到重启声后，长按C键或是option键。长按option键后，会出现菜单让你选择启动读取方式，选择CD/DVD驱动器即可。长按C键则会直接跳过这个选择界面直接读取CD/DVD数据重新启动计算机。
- 这会花些时间。你需要等到菜单出现或重启程序自动开始再放手。
  
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- 一般来说，从CD启动数据明显慢于硬盘。所以开机装载过程缓慢实属正常。
  
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