Edit: Apparently, my original answer of using Technet is incorrect if you plan on testing custom code with the Technet-provided products. I'm not going to comment on whether it's illegal or not, since I Am Not A Lawyer, Nor Do I Play One On TV, but it is clearly a violation of MS's license agreement to do it. So, if you want to test custom code on MS products, apparently you will need to grab one of the MSDN subscriptions. My apologies for any confusion this may have caused.
Less expensive than MSDN (over $1000 I believe) is MS Technet Plus ($349 for download-only; $249 to renew). Since you are only asking for operating systems, not developer tools. Technet includes everything MS has except Visual Studio and related. I use this for building systems within my VMWare testbed. 10 licenses per OS.
There are 32-bit and 64-bit versions of all their OS and servers, plus legacy stuff going back to MS-DOS.
There are a couple caveats - the images expire in a few months, then they put up new ones for download - so these really are for testing. Also their licensing might have restrictions in addition to the expiration date (I honestly don't know - I haven't used one of these in a long time).
Currently the available images are:
WinXP SP3 with IE6
WinXP SP2 with IE7
WinXP SP3 with IE8 Beta
Vista with IE7
WinXP to Windows 8.1, IE6 to IE11
For other OS's, your best bet is something like the MSDN or Technet subscription mentioned elsewhere.
The easiest way is with a MSDN subscription of some sort. You get ISO's of all the OS's for testing purposes for one yearly fee. Depending on your situation the cost varies.
Oddly, the partner site is completely broken for Google Chrome right now.
Edit: If you qualify for Action Pack, Empower, or Bizspark then you're talking ~$300/year for 5 MSDN subscriptions, a bunch of office licenses, real SQL Server licenses, etc.
如果您在 DVD 上有这些操作系统的安装程序，则可以将 Virtual PC 路由到使用主机 PC 的磁盘驱动器，然后从磁盘启动虚拟机。 然后，您继续安装操作系统，就像在实际计算机上安装一样。
确保提前为每台虚拟 PC 分配足够的资源。
这就是我为 Microsoft Virtual PC 所做的
If you have the installers for these OSs on DVDs, you can route your Virtual PC to user the host PC's disk drive and just boot the virtual machine off the disk. Then you continue with the OS install as if you were doing it on an actual machine.
Make sure you allocate enough resources to each virtual PC ahead of time.
You can get the ISOs from MSDN and install them as VMs. Once you have a fresh install, take a snapshot so you can easily start off with a clean slate, or at various different points (e.g. OS without .NET and OS with .NET).
An MSDN subscription is what you need. All the old OSs in different versions (including international). Not as VM images though, you'll need to install them yourself. The licence terms would prohibit a 3rd distrubuting OS image files obviously.
您应该考虑的另一个虚拟化工具是 Sun 的 VirtualBox。 它可以在任何平台上运行，并且可以运行大多数任何操作系统，甚至可以使用无缝窗口。 它是免费的、易于安装并且使用最少的资源。 以下是已知支持的操作系统的列表
Another virtualization tool you should consider is VirtualBox by Sun. It runs on any platform, and can run most any OS, even with seamless windows. It's free, easy to install and uses minimal resources. Here's a list of known supported OSes
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编辑：显然，如果您打算使用 Technet 提供的产品测试自定义代码，那么我最初使用 Technet 的答案是不正确的。 我不会评论这是否违法，因为我不是律师，我也不在电视上玩律师，但这显然违反了微软的许可协议。 因此，如果您想在 MS 产品上测试自定义代码，显然您需要获取 MSDN 订阅之一。 对于这可能造成的任何混乱，我深表歉意。
MS Technet Plus 比 MSDN（我认为超过 1000 美元）便宜（仅下载 349 美元；续订 249 美元）。 因为您只需要操作系统，而不需要开发人员工具。 Technet 包括 MS 拥有的除 Visual Studio 及相关产品之外的所有内容。 我使用它在我的 VMWare 测试台中构建系统。 每个操作系统 10 个许可证。
他们的所有操作系统和服务器都有 32 位和 64 位版本，以及可追溯到 MS-DOS 的旧版本。
此处的信息：http://technet.microsoft.com/en-us/subscriptions/默认.aspx
Edit: Apparently, my original answer of using Technet is incorrect if you plan on testing custom code with the Technet-provided products. I'm not going to comment on whether it's illegal or not, since I Am Not A Lawyer, Nor Do I Play One On TV, but it is clearly a violation of MS's license agreement to do it. So, if you want to test custom code on MS products, apparently you will need to grab one of the MSDN subscriptions. My apologies for any confusion this may have caused.
Less expensive than MSDN (over $1000 I believe) is MS Technet Plus ($349 for download-only; $249 to renew). Since you are only asking for operating systems, not developer tools. Technet includes everything MS has except Visual Studio and related. I use this for building systems within my VMWare testbed. 10 licenses per OS.
There are 32-bit and 64-bit versions of all their OS and servers, plus legacy stuff going back to MS-DOS.
Information here: http://technet.microsoft.com/en-us/subscriptions/default.aspx
对于选定数量的操作系统/IE 配置，您可以从 Microsoft 免费获取已安装操作系统的 VPC 映像：
(http://www.modern.ie/)
有一些注意事项 - 图像会在几天后过期几个月，然后他们发布了新的供下载 - 所以这些确实是为了测试。 此外，除了到期日期之外，他们的许可可能还有限制（老实说，我不知道 - 我已经很长时间没有使用其中之一了）。
目前可用的映像有：
对于其他操作系统，您最好的选择是其他地方提到的 MSDN 或 Technet 订阅。
You can get VPC images of installed OS's from Microsoft at no cost for a select number of OS/IE configurations:
(http://www.modern.ie/)
There are a couple caveats - the images expire in a few months, then they put up new ones for download - so these really are for testing. Also their licensing might have restrictions in addition to the expiration date (I honestly don't know - I haven't used one of these in a long time).
Currently the available images are:
For other OS's, your best bet is something like the MSDN or Technet subscription mentioned elsewhere.
最简单的方法是订阅某种 MSDN。 您只需支付一年的费用即可获得用于测试目的的所有操作系统的 ISO。 根据您的情况，费用会有所不同。
奇怪的是，Google Chrome 的合作伙伴网站现在完全崩溃了。
编辑：
如果您有资格获得 Action Pack、Empower 或 Bizspark，那么您每年大约需要花费 300 美元购买 5 个 MSDN 订阅、一堆 Office 许可证、真正的 SQL Server 许可证等。
The easiest way is with a MSDN subscription of some sort. You get ISO's of all the OS's for testing purposes for one yearly fee. Depending on your situation the cost varies.
Oddly, the partner site is completely broken for Google Chrome right now.
Edit:
If you qualify for Action Pack, Empower, or Bizspark then you're talking ~$300/year for 5 MSDN subscriptions, a bunch of office licenses, real SQL Server licenses, etc.
如果您在 DVD 上有这些操作系统的安装程序，则可以将 Virtual PC 路由到使用主机 PC 的磁盘驱动器，然后从磁盘启动虚拟机。 然后，您继续安装操作系统，就像在实际计算机上安装一样。
确保提前为每台虚拟 PC 分配足够的资源。
这就是我为 Microsoft Virtual PC 所做的
If you have the installers for these OSs on DVDs, you can route your Virtual PC to user the host PC's disk drive and just boot the virtual machine off the disk. Then you continue with the OS install as if you were doing it on an actual machine.
Make sure you allocate enough resources to each virtual PC ahead of time.
That is how I did it for Microsoft Virtual PC
查看 VMWare Appliance Market：
Windows 7
Windows 2008 服务器
Windows 2003 R2 服务器
Take a look at the VMWare Appliance Market:
Windows 7
Windows 2008 Server
Windows 2003 R2 Server
您可以从 MSDN 获取 ISO 并将它们安装为 VM。 全新安装后，拍摄快照，以便您可以轻松地从头开始，或者在各个不同的点（例如，不带 .NET 的操作系统和带 .NET 的操作系统）。
You can get the ISOs from MSDN and install them as VMs. Once you have a fresh install, take a snapshot so you can easily start off with a clean slate, or at various different points (e.g. OS without .NET and OS with .NET).
MSDN 订阅正是您所需要的。 所有不同版本的旧操作系统（包括国际版本）。 但不是虚拟机映像，您需要自己安装它们。 许可条款显然会禁止第三种分发操作系统映像文件。
An MSDN subscription is what you need. All the old OSs in different versions (including international). Not as VM images though, you'll need to install them yourself. The licence terms would prohibit a 3rd distrubuting OS image files obviously.
您应该考虑的另一个虚拟化工具是 Sun 的 VirtualBox。 它可以在任何平台上运行，并且可以运行大多数任何操作系统，甚至可以使用无缝窗口。 它是免费的、易于安装并且使用最少的资源。 以下是已知支持的操作系统的列表
Another virtualization tool you should consider is VirtualBox by Sun. It runs on any platform, and can run most any OS, even with seamless windows. It's free, easy to install and uses minimal resources. Here's a list of known supported OSes