Microsoft on Tuesday announced retail pricing for Vista, its long-delayed Windows update, and said it will broaden testing to more than 5 million people.

Last week, pricing information had been briefly posted on Microsoft's Canadian Web site.

Then on Friday, Microsoft issued Release Candidate 1 of Windows Vista, a near-final test version of the operating system.

Pricing for full retail versions of the software will be Windows Vista Ultimate, $399; Windows Vista Business, $299; Windows Vista Home Premium, $239; and Windows Vista Home Basic, $199.

Upgrades from Windows XP are priced at Windows Vista Ultimate, $259; Windows Vista Business, $199; Windows Vista Home Premium, $159; and Windows Vista Home Basic, $99.

The company said it is broadening its existing Vista customer preview program. The program lets developers and other business users obtain pre-release code. Microsoft said it will this week expand the program to "technology enthusiasts" so that they can test the consumer-specific features of Vista.