如果您拥有有效的Windows 产品密钥，则可以从(Windows product)Microsoft下载(Microsoft)Windows 7、Windows 8.1 或 Windows 10的完整合法副本，并使用它们重新格式化您的计算机或设置新计算机。
更好的是，您现在也可以使用Windows 7或 Windows 8.1产品密钥(product key)在计算机上安装Windows 10。因此，如果您有一台Windows 7或 8.1 PC 并且想要执行全新安装，您现在可以下载Windows 10 ISO 映像(ISO image)并在安装后使用您当前的产品密钥(product key)激活Windows 10。
Microsoft仍在维护的唯一限制是您必须在安装了 Windows 7 或 Windows 8.1 的同一台 PC 上安装Windows 10 。然而，即使有这个限制，这对微软(Microsoft)来说也是一个很大的变化，对消费者来说也很棒。
在本文中，我将讨论如何从Microsoft下载适用于最新版本Windows的合法(Windows)ISO 映像(ISO image)，并创建可启动的USB 闪存(USB flash)驱动器，以便您可以在 PC 上安装操作系统。
下载 Windows(Download Windows 10) 10、8、7 ISO映像
以前，您曾经能够从名为DigitalRiver的(DigitalRiver)合作伙伴公司下载适用于(partner company)Windows的(Windows)ISO 映像(ISO image)文件，但微软(Microsoft)在大约一年前取消了该选项。
现在要下载任何最新的操作系统，您必须访问此处的软件下载页面(software download page)：
https://www.microsoft.com/en-us/software-download/home
在顶部，您会看到Windows 10、Windows 8.1和Windows 7。对于Windows 10和Windows 8.1 ，您无需 产品密钥(product key)即可下载ISO映像。一旦你开始设置过程(setup process)，你必须输入它。
下载视窗 7
但是，对于Windows 7，您实际上需要输入产品密钥(product key)才能下载ISO 映像(ISO image)文件。
输入有效的产品密钥(product key)后，您将选择语言以及是否要下载 32 位或 64 位版本。请注意，您要下载的Windows 7版本取决于您的产品密钥(product key)。因此，如果您使用的是Windows 7 Home 键(Home key)，您将只能下载Windows 7 Home。
下载并安装 Windows 8.1
对于Windows 8.1，您必须下载媒体创建工具(creation tool)。媒体创建工具(creation tool)的好处在于您可以使用它下载Windows 8.1并将其直接安装到USB 闪存(USB flash)驱动器或将其刻录到DVD中。
下载并运行该工具后，系统会询问您要下载的语言、版本和架构。(edition and architecture)
单击下一步(Click Next)，您可以选择将文件直接保存到USB 闪存(USB flash)驱动器或下载ISO并将其刻录到DVD。
如果您选择 USB闪存驱动器(flash drive)，系统会要求您插入一个，然后才能开始下载。之后，当您单击下一步时，将开始下载。
下载完成后，该工具将开始将操作系统安装到USB 驱动器(USB drive)或下载ISO 文件(ISO file)。
下载并安装 Window 10
对于Windows 10，您会在顶部看到一个名为立即升级(Upgrade now)的按钮，它将尝试将您的Windows 7或 Windows 8.1 安装升级到Windows 10。继续向下滚动，您会看到“立即下载工具(Download tool now)”按钮。
Windows 10 还附带了一个媒体创建工具(creation tool)，它的功能与Windows 8.1工具相同，但一开始有一个额外的选项。
首先，您选择是要升级当前 PC 还是为另一台 PC 创建安装介质。在我们的例子中，我们要选择后一个选项。
Windows 10媒体创建工具(creation tool)还将尝试根据当前 PC 硬件确定最适合您的选项(PC hardware)。如果您想选择不同的东西，您可以取消选中使用此 PC 的推荐选项框。(Use the recommended options for this PC)
您可以使用此工具从USB闪存驱动器或 ISO 文件中进行选择。(drive or ISO file)与Windows 8工具一样，如果您选择该选项，则必须 自己将ISO 映像刻录到(ISO image)DVD 。
如果您选择闪存驱动器，则只需确保已将一个闪存驱动器连接到您的计算机，然后再单击下一步。
适用于 Windows 7 的 USB 创建工具
如果您将 Windows 8 或 Windows 10 下载为ISO 文件(ISO file)，您可能希望将它们刻录到DVD。对于Windows 7，您只能选择下载ISO 文件(ISO file)（无媒体创建工具(creation tool)），因此您可能希望将其刻录到DVD或制作可启动的USB 闪存(USB flash)驱动器。
幸运的是，Microsoft有另一个免费工具，称为USB/DVD Download Tool，它将获取ISO并将其安装到USB 闪存(USB flash)驱动器或将其刻录到DVD。请注意，此工具称为Windows 7 USB/DVD tool，但它也适用于Windows 10和Windows 8 ISO 映像(ISO image)文件。
下载并安装后，您只需完成四个步骤(step process)。首先(First)，您选择您的Windows ISO 映像(Windows ISO image)文件，如下所示。
接下来，您选择是要使用USB 设备(USB device)还是DVD作为Windows 安装(Windows installation)介质。
确保(Make sure)插入您的USB 设备或 DVD(USB device or DVD)，然后单击开始复制(Begin copying) 或开始刻录(Begin burning)按钮开始该过程。
您将收到一条弹出消息，指出必须擦除USB 设备才能继续。(USB device)继续并单击擦除 USB 设备( Erase USB Device)。该程序将格式化USB 设备(USB device)，然后开始安装。
完成后，您将拥有一个可启动的Windows USB 设备或 DVD 光盘(Windows USB device or DVD disc)。创建媒体后，您只需将其插入计算机并重新启动(computer and restart)。
大多数计算机会首先尝试从DVD 或 USB(DVD or USB)启动，因此安装应该会自动进行。但是，如果没有，您将不得不进入BIOS并手动更改引导顺序。(boot order)如果您有任何问题，请随时发表评论。享受！
Legally Download Windows 10, 8, 7 and Install from USB Flash Drive
If yoυ have a valid Windowѕ product key, you can download full legal copies of Windows 7, Windows 8.1 or Windows 10 from Microsoft and use them to reformat yoυr cоmputer or to setup a new computer.
What’s even better is that you can now use a Windows 7 or Windows 8.1 product key to install Windows 10 on a machine too. So if you have a Windows 7 or 8.1 PC and you want to perform a clean install, you can now download the Windows 10 ISO image and use your current product key to activate Windows 10 after it is installed.
The only restriction that Microsoft is still maintaining is that you must install Windows 10 on the same PC where Windows 7 or Windows 8.1 were installed. However, even with this restriction, it’s a big change for Microsoft and great for consumers.
In this article, I’ll talk about how you can download a legal ISO image from Microsoft for the latest versions of Windows and create a bootable USB flash drive so that you can install the OS on your PC.
Download Windows 10, 8, 7 ISO Images
Previously, you used to be able to download ISO image files for Windows from a partner company called DigitalRiver, but Microsoft removed that option about a year or so back.
Now in order to download any of the latest operating systems, you have to visit the software download page here:
https://www.microsoft.com/en-us/software-download/home
Across the top, you’ll see Windows 10, Windows 8.1 and Windows 7. For Windows 10 and Windows 8.1, you can download the ISO images without needing a product key. You have to enter that once you start the setup process.
Download Windows 7
For Windows 7, however, you actually need to enter a product key before you can even download the ISO image file.
Once you type in a valid product key, you’ll choose the language and whether you want to download the 32-bit or 64-bit version. Note that the version of Windows 7 you get to download will depend on your product key. So if you are using a Windows 7 Home key, you’ll only be able to download Windows 7 Home.
Download & Install Windows 8.1
For Windows 8.1, you have to download the media creation tool. What’s nice about the media creation tool is that you can use it to download Windows 8.1 and install it directly to a USB flash drive or burn it to a DVD.
Once you download the tool and run it, you’ll be asked the language, edition and architecture you want to download.
Click Next and you’ll have the option to save the file directly to a USB flash drive or download the ISO and burn it to a DVD.
If you pick USB flash drive, you’ll be asked to insert one before you can start the download. After that, the download will begin when you click Next.
Once the download is complete, the tool will begin installing the OS onto the USB drive or downloading the ISO file.
Download & Install Window 10
For Windows 10, you’ll see a button at the top called Upgrade now, which will try to upgrade your Windows 7 or Windows 8.1 install to Windows 10. Keep scrolling down and you’ll see a Download tool now button.
Windows 10 also comes with a media creation tool, which does the same thing as the Windows 8.1 tool, but has an extra option at the very beginning.
First, you choose whether you want to upgrade the current PC or create installation media for another PC. In our case, we want to choose the latter option.
The Windows 10 media creation tool will also try to determine the best options for you based on the current PC hardware. You can uncheck the Use the recommended options for this PC box if you want to pick something different.
You can choose from USB flash drive or ISO file using this tool. As with the Windows 8 tool, you’ll have to burn the ISO image yourself to a DVD if you pick that option.
If you pick flash drive, you’ll just need to make sure you have one already connected to your computer before you click Next.
USB Creation Tool for Windows 7
If you’re downloading Windows 8 or Windows 10 as an ISO file, you probably want to burn them to a DVD. For Windows 7, you only get the option to download the ISO file (no media creation tool), so you might want to burn it to a DVD or make a bootable USB flash drive.
Luckily, Microsoft has another free tool called the USB/DVD Download Tool that will take the ISO and install it onto a USB flash drive or burn it to a DVD. Note that this tool is called Windows 7 USB/DVD tool, but it works with the Windows 10 and Windows 8 ISO image files also.
Once you download and install it, you’ll simply go through a four step process. First, you pick your Windows ISO image file like shown below.
Next, you choose whether you want to use a USB device or a DVD for your Windows installation media.
Make sure to insert your USB device or DVD and then click the Begin copying or Begin burning button to start the process.
You’ll get a popup message stating that the USB device must be erased in order to continue. Go ahead and click Erase USB Device. The program will format the USB device and then begin the installation.
Once completed, you will have a bootable Windows USB device or DVD disc. Once you have created your media, you simply need to plug it into your computer and restart.
Most computers will try to boot from DVD or USB first, so the installation should come up automatically. However, if not, you will have to enter the BIOS and change the boot order manually. If you have any questions, feel free to post a comment. Enjoy!
