Despite Microsoft’s efforts to alienate it’s customers, it seems that they somehow left a loophole open that allows users to use an upgrade edition Windows Vista as full retail copy. The catch? You have to install Vista twice.

1. Boot from the Windows Vista Upgrade DVD and start the setup program.
2. When prompted to enter your product key, DO NOT enter it. Click “Next” and proceed with setup. This will install Windows Vista as a 30-day trial.
3. When prompted, select the edition of Vista which you have purchased and continue with setup.
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.
5. This time, type in your product key when prompted.
6. When asked whether to perform an Upgrade or Custom (advanced) install, choose Custom (advanced) to perform a clean install of Vista. Yes, this means that you will have to install Vista for a second time.
7. Once setup has completed for the second time, you should be able to activate Windows Vista normally. You can also delete the Windows.old directory which contains information from the first Vista install.

So, basically, you can choose between saving a nice big bill (perhaps to buy the newest Mac OS X coming soon), or you’ll have to install Windows twice every time you want to install it.

If Vista proves to be more stable and degrades less as time goes by, this might be a good alternative, if not, then I guess you’re better off spending the extra cash on the full version.

Related posts:

Vista Upgrade Version requires XP or 2000 installed to install
Vista Upgrade invalidates your Windows XP key
Microsoft to Release 20 Versions of Windows Vista
Windows Vista Upgrade Advisor
Windows Vista Product Editions Revealed

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