Beware Microsoft XP license trap warns Gartner
Under Microsoft's planned enterprise licensing rules, businesses that buy PCs before 23 April, 2010, with Windows 7 preinstalled can downgrade them to Windows XP, then later upgrade them to Windows 7 when they're ready to migrate their users.
But PCs bought on or after 23 April can only be downgraded to Vista -- which is of no help for XP-based organisations, Silver notes -- and could cause major headaches and add more costs to the Windows 7 migration effort.