Microsoft has released US pricing for Windows Vista, about a week after online retailer Amazon.com disclosed the OS's pricing on its website.
The company also expanded the tester base of Vista to about five million users as it begins gearing up for the flagship product's wide release, which is scheduled for early next year.
Microsoft's suggested US retail pricing for Windows Vista is as follows: $399 (about £211) for Windows Vista Ultimate, $299 (£158) for Windows Vista Business, $239 (£126) for Windows Vista Home Premium and $199 (£105) for Windows Vista Home Basic.
Upgrades to Windows Vista from XP are $259 (£137) for Windows Vista Ultimate, $199 (£105) for Windows Vista Home Premium and $99 (£52) for Windows Vista Home Basic.
The prices are the same as the ones listed on Amazon.com's website last week, with the exception that the online retailer listed an upgrade for Vista Home Basic as $0.95 more. Amazon.com is already taking pre-orders for Vista, and lists on its website that the OS will be available on 30 January 2007. Microsoft has not given a firm date for Vista's release, but is targeting some time in January.