Microsoft Corp said it will defer beyond the current quarter $450 million to $550 million of revenue expected to be generated from an offer to upgrade to its new Windows 8 operating system.
From Saturday, Microsoft is offering customers who buy qualifying Windows 7 PCs the option to download an upgrade to Windows 8 Pro for about $14.99.
The company said it would recognize the revenue from the offer when consumers actually upgrade or when the offer expires, whichever is earlier.
Microsoft shares were down 2 percent at $28.75 in premarket trading on Friday.
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