Upgrades will be available from Vista Home Premium to Windows 7 Home Premium, and from Vista Ultimate to Windows 7 Ultimate, said TechARP. Buyers of PCs equipped with Vista Business will be able to upgrade to a Windows 7 Professional.

Vista Express Upgrade also used clearly-defined upgrade paths. People who had bought a computer with Windows XP Media Center Edition 2005, for example, were offered only Vista Home Premium, while those who purchased an XP Home PC were given Vista Home Basic.

Microsoft and its hardware partners will be hoping for a smoother road to the upgrades this time around. Vista Express Upgrade was plagued with problems, including delays before users received their upgrade discs. In February 2007, nearly a month after Vista hit retail shelves, for instance, users flooded and support forums with .

In 2006 and 2007, PC makers charged a variety of prices for the XP-to-Vista upgrades. HP offered free upgrades, while others, including Dell, charged users $49. TechARP did not have any information on pricing, which would, if the Windows 7 program is handled the same way, be up to the individual makers.

Microsoft declined to comment on the TechARP posting. "We often explore options with our partners for how we offer products, but we have nothing to announce at this time," a company spokeswoman said Tuesday.