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Health and Fitness
The final addition to the Bing toolkit is this app, which has diet, exercise, and health tips available.
Turn your PC into a mobile hotspot
Internet Connection sharing is back in Windows 8.1. You can set up a PC or tablet so that other devices can share its broadband connection instead of chewing through precious mobile data.
Fingerprint logins have been a part of Windows for years. With Windows 8.1, the capability is built in and gets a spiffy modern UI.