http://www.pcworld.com/article/16941...ml?tk=rss_news

Microsoft on Friday let users who want to upgrade from one version of Windows 7 to another know how they can do so.

The company also unveiled pricing for the previously announced Windows 7 Family Pack, a version of the OS for households with multiple PCs. The family pack allows people to upgrade three PCs from earlier versions of Windows to Windows 7 Home Premium for US$149.99, saving more than $200, Microsoft said. An upgrade to Windows 7 Home Premium for one machine costs $119.99.

Once Windows 7 is available, people in the U.S. can buy a retail package that contains an upgrade key, which will give them the ability to upgrade on any of three paths: from Windows 7 Starter to Windows 7 Home Premium for $79.99; from Windows 7 Home Premium to Windows 7 Professional for $89.99; and from Windows 7 Home Premium to Windows 7 Ultimate for $139.99.