【转帖】非记录在案的用win7升级光盘全新安装的方法

farlee

Undocumented Method for a Clean Install of
Windows 7 with Upgrade Media
To perform a clean install of Windows 7 with Upgrade media, you need to install
Windows 7 once using the Upgrade Setup disk, but without entering your product
key during Setup. Then, once you’ve loaded the Windows 7 desktop for the
first time, you can run Setup again from within Windows 7 and choose Upgrade
(even though you’ll be “upgrading” to the exact same version of Windows 7).
Allow Setup to complete a second time, and then you’re good to go: you can
enter your product key after the second Setup routine is completed and activate
Windows 7 successfully.

绿字部分的翻译：
想用升级光盘进行全新安装，你需要先用升级光盘的中安装win7,但是在安装过程中不要输入 product key ，然后当你进入桌面以后，你再运行一下升级到win7程序（虽然你升级到前后是同样的win7）,当你安装完第二次，你可以输入你的product key 。可以成功激活你的win7了。

下面是用这中方法安装的法律风险跟具体操作方法及原因分析。

Is this process legal? After all, anyone could purchase an Upgrade version of Windows 7
(thereby saving a lot of money compared to a Full version) and use it to perform a clean
install even if they don’t own a previous, compliant Windows version.
If you own a previous version of Windows, yeah, it is legal. If not, no, it isn’t legal. It’s that
simple. From a technical standpoint, Microsoft designed Windows 7 to support upgrading
from a previously installed copy of Windows XP, Vista, or 7. It’s not a hacker exploit, but
rather a supported process that was deliberately programmed into the setup routine. It’s
Here are the complete instructions:
Step 1: Install Windows 7
Boot your PC with the Windows 7 Upgrade DVD. After the preliminary loading
screen, install Windows 7 normally. When you are prompted to enter your product
key, leave the product key field blank, deselect the option titled “Automatically
activate Windows when I’m online,” and then continue.
Setup will install Windows as documented in the “Clean Install” section earlier in
this chapter. (Refer to that section for a complete rundown of the process.) Once
Windows 7 is successfully installed and you are logged on, you’ll be presented
with your new Windows 7 desktop. Don’t get too comfortable, however, as you’re
about to do it all again.
Step 2: Upgrade from Windows 7…to Windows 7
If you try to activate Windows now, it will fail because you’ve performed a clean
install of Windows 7 and you have only an Upgrade product key. That means you
have 30 days during which you can run this non-activated version of Windows 7.
But why wait 30 days?
According to Microsoft, Upgrade versions of Windows 7 support upgrading
from “a compliant version of Windows, such as Windows 7, Windows Vista, or
Windows XP.” Well, you just installed Windows 7, so why not just upgrade from
that install? That’s right: you’re going to upgrade the non-activated clean install
you just performed, which will provide you with a version of the OS that you
can, in fact, activate.
To do this, just select Computer and double-click on the icon for the DVD drive
that contains the Windows 7 Upgrade media. Run Setup again, this time from
within Windows 7. When you get to the appropriate phase of Setup, choose the
Upgrade option. Windows will install as before, though you might notice that it
takes quite a bit longer this time. (Upgrade installs take up to 60 minutes, compared
to 20 minutes or so with clean installs, and reboot at least one additional
time.)
When Setup is completed, enter the username and password you created during
the first install and log on to Windows.
Now that you’ve “upgraded” Windows 7, product activation will actually work.
To activate Windows 7 manually and immediately (unless you told it to do so
during setup), from the Start menu, type activate in Start Menu Search, launch
Windows Activation, and click Activate Windows online now.

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书里说：原因是是key的缘故，升级key只能激活升级版。

估计有些弟兄说升级盘全新安装，说key有问题，需要先用别的key安装一下，再修改注册表，再输入coa的key才能激活，就是这个原因。

转自这本书：《Windows® 7 Secrets®》
作者：Paul Thurrott ； Rafael Rivera

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不过这次的微软给OEM的key好像都是可以全新安装的。