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How To Disable UEFI Secure Boot In Windows 8 & 8.1
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================================================================================
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These days, if you buy a computer pre-installed with Windows, you’ll end up with either Windows 8 or Windows 8.1. Starting with Windows 8, Microsoft replaced BIOS with UEFI. UEFI is not something that Microsoft invented, instead its a protocol in existence before Windows 8. Some Mac devices have been using UEFI for some time now.
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With UEFI comes the feature of “secure boot” which boots only those boot loaders that are signed in to UEFI firmware. This security feature prevents rootkit malware and provides an additional layer of security. But it has a down side, if you want to dual boot Windows 8 with Linux, Secure Boot will not allow it. Therefore it is advised to **disable secure boot in Windows 8 to allow dual booting with Linux**.
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### Disable UEFI secure boot in Windows 8 and 8.1 ###
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There have been too many noises around secure boot. Because of these rumors, some people almost believed that dual boot to Linux is not possible with pre-installed Windows 8. While that is true for Arm PCs, secure boot can be disabled in Intel based system. Honestly, **disabling UEFI secure boot** is not at all a herculean task and same can be said for dual booting Linux with Windows 8 UEFI.
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While it is fairly straight forward to access BIOS settings, you press F10 or F12 at boot time, it’s not the same case with UEFI. To access UEFI settings, you’ll have to go from within Windows. Let’s see how to access UEFI settings to disable secure boot in Windows 8.
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#### Step 1: Go to PC settings ####
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Open the settings charms in Windows by pressing Windows+I keys. At the bottom, you’ll see the option of Change PC settings. Click on it.
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#### Step 2: Go to Advanced startup ####
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There will be a slight difference in PC settings for Windows 8 and Windows 8.1. Depending upon which one you are using, you can follow the respective procedure described below:
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Windows 8: In Windows 8, you need to go to General PC settings and select **Advanced startup** and then click on **Restart now:**
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**Window 8.1**: In Windows 8.1, go to **Update and recovery** from left sidebar:
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Then click **Restart now** under **Advanced startup**:
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Don’t worry! It won’t restart right after it, instead it will provide some option that you will see on next boot.
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#### Step 4 Access UEFI settings ####
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After you have clicked Restart now button, you will be presented with some options to choose from in the next screen. Select **Troubleshoot** here:
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In **Troubleshoot** menu, select **Advanced options**:
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In Advanced options menu, choose **UEFI Firmware settings**:
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Next, click on **Restart** button to reboot your system in UEFI settings which ‘may’ seem to have similar interface as BIOS.
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#### Step 5: Disable secure boot in UEFI ####
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By this time you must have been booted in to UEFI utility. You can change various settings here but all we want to do right now is to disable secure boot option to allow dual booting of Ubuntu or any other Linux
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Move to Boot tab, there you’ll find **Secure Boot** option which is set to enabled. Use the arrow key to go to Secure Boot option and then press **enter** to select it. **Use + or – to change its value**. Confirm it when prompted. Press **F10 to save the changes** and exit the UEFI settings.
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Next you’ll be booted in to Windows normally. Now you should be able to dual boot Windows 8 with Ubuntu or other Linux OS. I’ll be writing on how to dual boot Ubuntu with Windows 8 UEFI in coming days. Stay tuned.
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I hope this tutorial helps you to disable secure boot in Windows 8 and Windows 8.1. Any questions or suggestions are always welcomed. Feel free to drop a comment.
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--------------------------------------------------------------------------------
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via: http://itsfoss.com/disable-uefi-secure-boot-in-windows-8/
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译者：[译者ID](https://github.com/译者ID) 校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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如何在Windows 8 & 8.1上禁用UEFI安全验证
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================================================================================
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现在，如果你买了预装Windows的电脑，一般都是Windows8或Windows8.1。从Windows8开始，微软用UEFI取代了BIOS。尽管UEFI不是微软发明的，在Windows8之前他就已经存在。比如某些Mac设备就已经使用UEFI有一段时间了。
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UEFI有“安全启动”这个特点，引导程序只会启动那些得到UEFI固件签署的引导装载程序。此安全功能可以防止Rootkit类的恶意软件，并提供了额外的安全层。但它有一个缺点，如果你想在Linux的电脑上启动Windows8，安全机制将会制止他。因此，我们建议**禁用安全启动，来让Windows 8支持Linux的双系统启动**。
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### 在Windows 8 & 8.1上禁用UEFI安全验证 ###
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现在在关于安全启动，充斥着各种各样的杂音。由于这些传闻，有些人几乎认为在预装Windows8的电脑上启动到Linux是不可能的，虽然在ARM上这是真的。但是安全引导可以在基于Intel的系统上被禁用。老实说，**禁用UEFI安全启动**不是一个艰巨的任务，同样的双启动的Linux与Windows 8 也不是。
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While it is fairly straight forward to access BIOS settings, you press F10 or F12 at boot time, it’s not the same case with UEFI. To access UEFI settings, you’ll have to go from within Windows. Let’s see how to access UEFI settings to disable secure boot in Windows 8.
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虽然在当年BIOS时，这是相当简单的，在启动的时候按F10或F12键即可。但是在UEFI的世界里，就不一样了。要访问UEFI设置，你就必须到Windows中去。让我们来看看如何访问UEFI设置禁用Windows8安全启动。
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#### Step 1: 进入PC设置 ####
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点击 Windows+I 按钮进入Windows设置界面。在底部，你会看到更改电脑设置的选项。点击它。
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#### Step 2: 进入高级启动 ####
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在Windows 8和Windows8.1上，PC设置有一个细微的差别。依照你使用的系统，你需要分别按照下面介绍的各个步骤进行操作：
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Windows 8的：在Windows 8中，你需要进入一般的PC设置，并选择**高级启动**，然后点击**立即重新启动：**
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**Window 8.1**的：在Windows8.1，从左侧边栏点击**更新和恢复**：
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然后单击**立即重新启动**下的**高级启动**：
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不要担心！这之后也不会立刻重新启动，而是会提供一些选项，你将在下次开机看到的。
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#### Step 4: 进入UEFI设置 ####
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当您单击立即重新启动按钮，你将会看到一些选项从下一屏幕选择。选择**疑难解答**这里：
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在**疑难解答**菜单中，选择**高级选项**：
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在高级选项菜单中，选择** UEFI固件设置**：
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接下来，在在UEFI设置里，点击**重新启动**按钮重新启动您的系统，就像之前在BIOS中做的一样。
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#### Step 5: 在 UEFI 中禁用安全启动 ####
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这个时候，你必须已经启动到UEFI工具。你可以在这里更改各种设置，但所有我们想要做的，就是禁用安全启动选项，允许的Ubuntu的双启动或任何其他的Linux。
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移动到启动选项卡，在那里你会发现**安全引导**选项被设置为启用。使用箭头键进入安全引导选项，然后按**进入**来选择它。 *使用+或 - 来改变它的值。**确认提示时。按** F10键保存更改**并退出UEFI设置。
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接下来，您将到Windows正常开机。现在，你应该可以双启动的Windows8与Ubuntu或其他Linux操作系统。我会在未来的日子里写关于如何双启动的Ubuntu与Windows 8 UEFI。敬请关注。
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我希望这个教程可以帮助你禁用Windows8和Windows8.1的安全引导。任何疑问或建议，随时欢迎。随时给意见。
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--------------------------------------------------------------------------------
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via: http://itsfoss.com/disable-uefi-secure-boot-in-windows-8/
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译者：[MikeCoder](https://github.com/MikeCoder) 校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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