You might have read my previous post titled Upgrading to Vista with clean install? Forget it. Paul Thurrot at Windows IT Pro has a work around. Here are the steps he wrote:

1. Boot with the Windows Vista Upgrade DVD.

2. Click “Install Now.”

3. Do not enter a Product Key When prompted.

4. When prompted, select the Vista product edition that you do have.

6. Install Vista normally.

7. Once the install is complete, restart the DVD-based Setup from within Windows Vista. Perform an in-place upgrade.

8. Enter your Product Key when prompted.

I don’t have Vista to test this, so  use it at your own risk.

Thanks to Cybernet for the info.

 

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