曾经必须从 CD 或DVD启动，并且想在该启动环境中截取一些屏幕截图吗？也许您正在尝试修复您的计算机并且必须使用操作系统DVD启动，但不知道该怎么做。您可以截取屏幕截图并将其发送给您的技术朋友。您也可以使用智能手机或数码相机拍摄屏幕照片。
或者，也许您像我一样，需要非常好的屏幕截图，而不是通常在尝试拍摄计算机屏幕时得到的模糊、颗粒状或闪烁的屏幕截图。不幸的是，如果没有加载操作系统，则无法截取引导环境的屏幕截图。你会用什么程序来截屏？
幸运的是，有办法解决这个问题。这就是你要做的。重新启动计算机时不要启动 CD 或DVD ，而是将其启动到当前操作系统上运行的虚拟机中。如果这对您来说听起来很可怕，请不要担心，这并不是那么糟糕。
虚拟机软件基本上可以让您在当前操作系统中运行其他操作系统。因此，您可以在Windows 7中运行(Windows 7)Linux或在Windows 8中运行Windows XP等。那么您将如何做呢？安装虚拟机程序。实际上只有一个免费且运行良好：VirtualBox。
它是完全免费的，并且有很多功能。出于我们的目的，我们并不关心所有的花里胡哨，我们只希望它加载我们的CD/DVD或ISO映像，如果您正在使用它。其他虚拟机应用程序是Parallels ( Windows/Mac/Linux )、VMware ( Windows ) 和VMware Fusion ( Mac )。这些是您仅在定期使用虚拟机时才需要的商业应用程序。
使用 VirtualBox 截图
要开始使用，请继续为您的操作系统下载VirtualBox并安装它。(VirtualBox)安装后，打开程序，它应该看起来像这样：
继续并单击新建(New)按钮，您将看到一个弹出窗口，您需要在其中输入有关您正在创建的虚拟机的一些信息。
继续并为您的虚拟机命名，然后选择Type和Version。对于Type，您将有Windows、Linux、Mac、BSD、Solaris等选项，但您将要选择Other因为您实际上并不打算安装任何东西。您只想从光盘或映像启动，仅此而已。
对于Type，您的选择主要是DOS或Other/Unknown。那里还有其他一些选择，但这是非常具体的东西，只有在安装该特定操作系统时才会选择。
单击下一步(Click Next)，您需要选择要专用于操作系统的RAM量。(RAM)在这里，为了安全起见，我会选择 64 MB 或 128 MB。
单击下一步(Click Next)，您必须选择是否需要硬盘驱动器。就我而言，我选择了不添加虚拟硬盘(Do not add a virtual hard drive)，因为我只想加载启动屏幕，不需要实际安装任何东西。
当您单击下一步时，您将收到一条弹出消息，警告您没有硬盘。你可以忽略它。继续并单击完成(Finish)以完成虚拟机。现在您已经设置好了，您必须告诉VirtualBox可启动设备或映像的实际位置。
为此，请在左侧菜单中选择虚拟机（在我的情况下为Boot CD），然后单击“开始(Start)”按钮。您将收到一条弹出消息，询问您启动磁盘的位置。默认情况下，它将显示物理CD/DVD驱动器的驱动器号。确保(Make)在按Start之前插入(Start)CD/DVD。
如果您有ISO映像，请单击下拉框右侧的小文件夹图标，它会让您选择ISO映像。就是这样。单击开始(Click Start)，您会惊奇地发现，您可以在当前的Windows/Mac/Linux会话中观看整个启动过程！
从上面的屏幕截图中可以看出，我有一个启动修复ISO映像，我将它加载到VirtualBox中，这样我就可以为我的下一篇文章截取它。好甜(Pretty)！有任何问题吗？让我们在评论中知道。享受！
HDG Guide to Taking Screenshots of Boot Environments
Ever had to boot from a CD or DVD and wanted to take sоme screenshots while you were in that boot еnvironment? Maybе you are tryіng to fix your сomрuter and have to boot using the oрerating system DVD, but can’t figure out what to do. You could take a sсreenshоt and send it to your tech friend. You cоuld also just take a photo of the screen with your smartphone or digital camera.
Or maybe you’re like me and you need very good screenshots and not blurry or grainy or flickering screenshots that you normally get when trying to take pictures of computer screens. Unfortunately, there is no way to take a screenshot of a boot environment if no operating system is loaded. What program would you use to take the screenshot?
Luckily, there is a way around this. Here’s what you do. Instead of booting the CD or DVD when you restart your computer, boot it into a virtual machine that is running on your current operating system. If that sounds scary to you, don’t worry, it’s not all that bad.
Virtual machine software basically lets you run other operating system inside your current OS. So you could run Linux inside Windows 7 or run Windows XP inside Windows 8, etc, etc. So how do you go about doing this? Install a virtual machine program. There is really only one that is free and that works well: VirtualBox.
It’s completely free and has a lot of features. For our purposes, we don’t care about all the bells and whistles, we just want it to load our CD/DVD or ISO image, if you’re using that. Other virtual machine applications are Parallels (Windows/Mac/Linux), VMware (Windows) and VMware Fusion (Mac). These are commercial applications you would only need if you worked with virtual machines on a regular basis.
Using VirtualBox for Screenshots
To get started, go ahead and download VirtualBox for your operating system and install it. Once installed, open the program and it should look something like this:
Go ahead and click on the New button and you’ll get a pop up window where you’ll need to enter some info about the virtual machine you’re creating.
Go ahead and give your virtual machine a name and then choose the Type and Version. For Type, you’ll have options like Windows, Linux, Mac, BSD, Solaris, etc, but you’re going to want to pick Other since you’re not actually planning on installing anything. You just want to boot from the disc or image and that’s it.
For Type, your choices will mostly will be DOS or Other/Unknown. There are some other choices there, but it’s very specific stuff that you would only choose if you were installing that particular OS.
Click Next and you’ll need to choose the amount of RAM you want to dedicate to the OS. Here I would choose something like 64 MB or 128 MB to be on the safe side.
Click Next and you have to choose whether you want a hard drive or not. In my case, I chose Do not add a virtual hard drive because I only want to load the bootup screens and don’t need to actually install anything.
You’ll get a pop up message when you click Next warning you about not having a hard drive. You can just ignore that. Go ahead and click Finish to finalize the virtual machine. Now that you have set it up, you have to tell VirtualBox where the bootable device or image actually resides.
To do this, select the virtual machine in the left menu (Boot CD in my case) and click on the Start button. You’ll get a pop up message asking you where the startup disk is located. By default, it will show you the drive letter for your physical CD/DVD drive. Make sure the CD/DVD is inserted before you press Start.
If you have an ISO image, then click on the small little folder icon to the right of the drop down box and it’ll let you select an ISO image. That’s about it. Click Start and you’ll be amazed to that you can watch the whole boot process right inside your current Windows/Mac/Linux session!
As you can see from the screenshot above, I have a boot repair ISO image that I loaded up into VirtualBox so I could take screenshots of it for my next article. Pretty sweet! Have any questions? Let us know in the comments. Enjoy!
