Customer concerns over changes to Windows Vista licensing that would limit a transfer of the license to only one machine have moved Microsoft to revise the operating system licensing policy.
Microsoft said today it has changed the retail license terms for Vista so that customers now may uninstall the OS from one machine and install it on another as many times as they want. The new terms do away with limitations on the number of new devices to which the license can be transferred.
However, to continue the discouragement of piracy, Microsoft has worded the license so that it is clear that users cannot "share this license between devices."
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http://www.pcworld.com/article/id,12...S/article.html