DailyTech reported on Monday that Microsoft no longer performs disc checks during an operating system install. In the past, when performing a clean install, a user could boot from an install CD and insert a disc from a previous version of Windows for upgrade compliance.

However, per Microsoft's new licensing requirements for Vista, users are required to install a Windows Vista Upgrade from within Windows XP. When this occurs, the Windows XP license is forfeited and the Windows Vista installation process can take place.

DailyTech has confirmed a new workaround proposed by Paul Thurrott (via Microsoft internal documents).

This workaround allows users to perform a “clean install.” The process is a bit tedious, but is not hard at all to complete. Users have to perform these simple steps to perform a clean install of Vista without a previous version of Windows installed with an upgrade DVD: