Microsoft will restrict upgrade rights for Vista and XP users to 25 machines at any single street address. This means larger companies will have to go through volume licensing for their migration plans
Microsoft will provide free or discounted Windows 7 upgrades not only to users who buy Vista PCs between June 2009 and January 2010, but also to people who buy a system that's been factory-downgraded to Windows XP, according to a report on the Web