Microsoft says it will release its official version of Windows 7 on Thursday. After seven months of testing, the company says the new product has won high marks from users.

Microsoft CEO Steve Ballmer speaks about the upcoming release of Microsoft's new operating system, Windows 7, in Toronto, October 21, 2009. [Mark Blinch/CCTV/REUTERS/CANADA BUSINESS]

Microsoft says Windows 7 stresses simplicity of operation and sharing, with the focus on human-computer interface. The company says the new program will make it easier to search and use information.

The company says it expects Windows 7 to boost demand on the PC market. It has not yet made public the amount spent on promoting the product.