Sales of Kinect for the Xbox and Office 2010 helped boost Microsoft revenue by 15 percent last quarter, the company announced Thursday.

Revenue landed at $19.95 billion. That’s up from $19 billion from the same time period last year, though that $19 billion figure included $1.71 billion in deferred revenue from the Windows 7 Upgrade Option program and Windows 7 pre-orders. As a result, revenue was up 15 percent year-over-year without that deferment, Microsoft said.

Profit came in at $6.63 billion, down slightly from last year’s $6.66 billion.

The big winner last year was Microsoft’s Entertainment & Devices division, which grew 55 percent thanks to the Kinect, which also helped boost sales of the Xbox 360 consoles, Xbox Live subscriptions, and Xbox games. At this year’s CES, Microsoft chief executive Steve Ballmer announced that Microsoft sold 8 million Kinect devices in its first 60 days on the market.

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The company’s business division also grew 24 percent last year, buoyed by the release of Office 2010, which made its debut in June.

Office 2010 is the fastest-selling consumer version of Office in history, Microsoft said. License sales are more than 50 percent ahead of what Office 2007 achieved in the same time period.

“Office had a huge quarter, exceeding everyone’s expectations, and our roadmap for cloud productivity with Office 365 makes products like SharePoint, Exchange, Lync and Dynamics CRM even more attractive to our customers,” Kevin Turner, chief operating officer at Microsoft, said in a statement.

Microsoft also announced that it has now sold more than 300 million Windows 7 licenses. “To put that in perspective, 300 million is roughly the combined number of households in North American and in Europe! Or, to put it another way, if you lined up 300 million Windows 7 product boxes, they would stretch nearly 1.5 times around the Earth,” Microsoft said in a blog post.

At this point, more than 20 percent of Internet-connected PCs are running Windows 7, according to Net Applications.

Earlier this week, Microsoft said it has now sold 2 million Windows Phone 7 devices, though those sales are to OEMs; Microsoft did not break out consumer sales. Instead it focused on user satisfaction and a growing developer community, a theme it reiterated during its earnings call.

Microsoft is “encouraged” by Windows Phone 7 sales, but “we realize we still have a lot of work ahead of us and we remain focused and committed to the long-term success of Windows Phone 7,” the company said. Microsoft said it will soon add new features to the OS, as well as support for CDMA phones, which includes Verizon.

January has just not been a pleasant month for video game sales. At least, that’s according to new numbers released by NPD. Total January 2011 sales for gaming accessories, portable systems, and games for PCs and consoles fell to $1.16 billion from last year’s total of $1.22 billion. And the $1.22 billion figure for January 2010 is itself a decrease from January 2009 figures, or $1.33 billion in total sales.

Breaking that number out a bit, hardware sales took the biggest year-to-year hit, dropping 8 percent from $353.7 million in January 2010 to $324 million in January 2011. NPD no longer splits this number out into publicly available data for the various console manufacturers; however, Wedbush analyst Michael Pachter said that Microsoft was the only big player to experience year-to-year growth on hardware sales.

According to Pachter, Microsoft sold approximately 332,800 Xbox 360 units, representing a year-to-year growth of 14.4 percent for the company. More than half of the systems sold were also bundled with Microsoft’s Kinect accessory.

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Nintendo, on the other hand, found its sales down 31.5 percent compared to the same period of time last year. That’s a drop from 465,800 Wii consoles sold in January 2010 to 319,000 sold in January 2011. The company still leads the current console market with 34.5 million Wii units sold in the U.S., in total, with Microsoft’s Xbox 360 coming in second place at 25.8 million, followed by Sony’s PlayStation 3 at 15.7 million.

The PlayStation 3 experienced slight drops in sales between January 2010 and January 2011, only losing 3 percent of its total between the two years—276,900 consoles sold in January 2010 versus 267,000 in 2011.

Overall software sales also took a hit between the two compared years, dropping off 5 percent in total sales from January 2010’s $606.8 million to January 2011’s $576 million. The top game (physical media only) remained Activision Blizzard’s “Call of Duty: Black Ops,” which debuted (and shot to the top of the charts) in November of last year.

Accessory sales for videogame consoles were the bright light in NPD’s monthly analysis. Sales increased a total of 8 percent from January 2010’s $222.8 million to January 2011’s $235.1 million. While there’s no official split as to how the two biggest contributors to this total fared—Microsoft’s Kinect and Sony’s Move—Pachter notes that Kinect-based software titles outsold similar Move-friendly titles for the PS3, and Microsoft’s console/accessory bundles outsold Sony’s by a ratio of five to one.