Lenovo recommends Windows. 

Features

FOUR DEVICES IN ONEINTELLIGENT TOUCHESOPTIMIZED FOR WINDOWS 8
Lenovo IdeaPad Yoga 11 - convertible laptop

Choose from one of four modes to use your Yoga:
tablet, laptop, tent or stand. Simply flip and fold
the touchscreen, then start your journey.

Lenovo IdeaPad Yoga 13 - convertible Ultrabook laptop

Enjoy innovations like InstantResume, to wake the device from
sleep mode in seconds; Microsoft Connected Standby (Yoga 11 only),
to keep you always connected; or Lenovo Motion Control (Yoga 13 only),
to input commands through the webcam via hand gestures.

Lenovo IdeaPad Yoga 11 - convertible laptop

This is what Windows 8 was meant for – multitouch
technology on a crystal-clear HD/HD+ screen, for
seamless integration and endless enjoyment.

Standard on All ModelsAvailable on Select ModelsNot Available
Core Technology
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Windows 8 Pro

Ready for business. With Windows 8 Pro, you get everything in Windows 8, plus enhanced features that help you easily connect to company networks, access files on the go, encrypt your data, and more.
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Windows 8

Beautiful, fast, fluid. Windows 8 has been reimagined to be all about you. Put what matters most right on your Start screen, and get instant access to your people, apps, and stuff, so you can spend less time searching and more time Doing.
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Windows RT

Go anywhere. Beautiful, fast, fluid. Instantly up to date. Office Home & Student 2013 RT Preview is included so you can Do more with Word, Excel, PowerPoint, and OneNote. Only works with apps from the Windows Store, not any other desktop applications.
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Office Home & Student 2013 RT Preview

Do more with Word, Excel, PowerPoint, and OneNote preloaded on your PC.
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3rd Generation Intel® Core™ i Series Processors

Thanks to this technology, Intel®-equipped PCs deliver smart, adaptive, and responsive performance and visuals that give users a better PC experience.
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NVIDIA® Tegra Processors

NVIDIA® Tegra processors deliver unprecedented performance in a wide range of mobile devices.
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ULV Processors

Ultra low voltage processors combine performance with energy efficiency for longer battery life.
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Microsoft Office 2010 Optimized

Lenovo systems are optimized for Microsoft Office 2010. Purchase a Product Key or DVD to activate the preloaded, full-featured Office software.
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Multimedia/Entertainment
  

11.6" HD Display

Enjoy vivid HD graphics on an 11.6", 16:9 widescreen display with a wide viewing angle.
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13.3" HD+ Display

Enjoy vivid HD+ graphics on an 13.3", 16:9 widescreen display with a wide viewing angle.
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Multitouch Display

Capacitive touch technology makes IdeaPad multitouch displays sensitive, responsive, and easy to use.
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IPS Technology

In-Plane Switching (IPS) technology makes your display clear and precise even from oblique angles — perfect for watching videos or looking at pictures with a group of friends.
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Integrated HD Webcam

The integrated 720p HD webcam is perfect for video chatting with friends or conferencing with clients and colleagues.
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Connectivity
  

802.11 b/g/n WiFi

Get online wirelessly for web browsing, social networking, email, watching videos, and more.
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Bluetooth™

Wirelessly connect your Yoga to a range of Bluetooth™-enabled devices such as mobile phones, headsets, keyboards, and mice. With Bluetooth enabled, sharing and synchronizing data between devices is easy and hassle-free.
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HDMI

Enjoy high-def sound and video by connecting to compatible devices with the HDMI port.
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USB 3.0

Transfer data between devices up to 10 times faster than previous USB technologies.
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Built-In Solutions and Convenience
  

All-Day Battery Life

Keep on the go for the long haul without worrying about fading batteries. Yoga Laptops can run all day on a single charge.
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Lenovo Transition

Lenovo Transition automatically locks the keyboard when the PC switches from laptop mode to tent, stand, or tablet modes.
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Lenovo Energy Management

Lenovo Energy Management protects the long-term durability of your Yoga's battery and uses advanced energy-saving technology to extend the life of each charge.
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Warranty and Support

IdeaPad laptops and netbooks are backed by the Lenovo standard warranty and Lenovo Service and Support, offering the help you need when you need it.
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Genuine Windows is authentic Windows software that is properly licensed and legally installed. Learn more about the special benefits reserved for genuine Windows customers by visiting www.microsoft.com/genuine.