HP only major vendor so far to promise no-charge upgrade, more expected

Microsoft Corp. today officially unveiled details of the Windows 7 upgrade program it kicks off tomorrow for buyers of new PCs.

Called the "Windows 7 Upgrade Option Program," the deal provides free or nearly-free upgrades to Windows 7 for people who purchase a new Vista PC between June 26, 2009, and Jan. 31, 2010.

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