如何在全球范围内识别不同的计算机？
对于为某台计算机颁发许可证，有什么好方法可以根据其硬件来确定一台唯一的、全局不同的计算机（如果重要的话，它们将始终运行 Windows）。
stackoverflow 上已经有这个问题的一些答案，但我已经在各种计算机上测试了所有方法，但没有一个真正有效。
此类硬件识别的常见方法有哪些？ Windows 如何做到这一点？
以下是我使用 WMI 测试的结果：
CPU-ID 建议此处
对于两台相同的计算机来说是相同的
在克隆驱动器（使用 Acronis TrueImage 测试）映像上是相同的
Windows 操作系统序列号
这是相同的在克隆驱动器上图像。
建议的主板序列号此处
我发现一些 PC 的 WMI 根本不返回序列号
也许 WMI 不返回适合这项工作的工具？是否还有另一个 API 可以避免我查询硬件详细信息？
Possible Duplicate:
Is there some uniqueID of each computer, to differentiate one from other?
For issuing licenses for a certain computer, what would be a good way to determine a unique, globally distinct computer (they will always run windows if that matters) based on their hardware.
There are already some answers to this question on stackoverflow but I have tested all the approaches across a wide range of computers and none of them really work.
What are common approaches to such hardware identification? How might Windows do it?
Here is what I tested using WMI:
CPU-ID as suggested here
It is the same to two identical computers
Harddrive Volumne-ID as suggested here or here
It is the same on a cloned drive (tested with Acronis TrueImage) image
Windows OS serial key
It is the same on a cloned drive image.
Motherboard serialnumer as suggested here
I have found some PCs where WMI does not return a serial number at all
Maybe WMI is not the right tool for the job? Is there another API somewhere out there that lest my query hardare details?
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本文介绍如何创建机器通用唯一标识符：
创建 MachineGUID
一种解决方案是将尽可能多的此 ID 合并为一个 ID，该 ID 的重复率要低得多：
This article describes how to create a Machine Universally Unique Identifier:
Creating a MachineGUID
One solution would be to combine as many of this ID's into one ID that has a much lower rate of being a duplicate: