Effectively this means that any retail upgrade DVD can be used as a fully functioning full retail copy of Vista.有效這意味著任何零售升級DVD能夠被用來作為一個充分運作的完整零售副本Vista的。 You can pay the price of an upgrade DVD version to get a clean Vista installation!你可以付出代價升級的DVD版本，以生成一個乾淨的Vista安裝！ The steps have been confirmed.該步驟已被確認。

  1. Boot from the Windows Vista Upgrade DVD and start the setup program.開機從Windows Vista升級DVD和啟動安裝程序。
  2. When prompted to enter your product key, DO NOT enter it.當提示您輸入產品金鑰，不要輸入。 Click “Next” and proceed with setup.單擊“ Next ” ，並進行安裝。 This will install Windows Vista as a 30-day trial.這將安裝Windows Vista作為一個30天的試用期。
  3. When prompted, select the edition of Vista which you have purchased and continue with setup.出現提示時，選擇的版本的Vista ，您已購買，並繼續安裝。
  4. Once setup has been completed and you have been brought to the desktop for the first time, run the install program from within Windows Vista.一旦安裝已經完成，你已帶來到桌面上為第一次，運行安裝程序從Windows Vista中。
  5. This time, type in your product key when prompted.這個時候，輸入您的產品金鑰，當系統提示。
  6. When asked whether to perform an Upgrade or Custom (advanced) install, choose Custom (advanced) to perform a clean install of Vista.當被問到是否執行升級或自定義（高級）安裝，選擇自定義（高級）執行乾淨安裝的Vista 。 Yes, this means that you will have to install Vista for a second time.是的，這意味著你將要安裝Vista的第二個時間。
  7. Once setup has completed for the second time, you should be able to activate Windows Vista normally.一旦安裝完成，為第二次的時間，您應該可以激活Windows Vista正常。 You can also delete the Windows.old directory which contains information from the first Vista install.您也可以刪除[ Windows.OLD目錄，其中包含的信息從第一Vista的安裝。

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Why Microsoft left this loophole?為什麼微軟離開了這個漏洞？ I am as much in the dark as you are.我多在黑暗中如你。