Microsoft internal documentation reveals workaround for Vista Upgrade DVDs with no need for a previous version of Windows
Link to Workaround Discovered For Clean Install With Vista Upgrade DVDs
Original article can be found at Workaround Discovered For “Clean Install” With Vista Upgrade DVDs at Dailytech.com. Clean installs are a useful fix for a variety of difficult to solve problems but I find it very curious that Microsoft does not require the original disk.