Assigned access: Available in Windows 8.1 RT, Windows 8.1 Pro, and Windows 8.1 Enterprise, it lets you enable a single Windows Store app experience on your PC or tablet.
Sync tabs in IE11: Internet Explorer 11 supports syncing tabs across multiple Windows 8.1 PCs.
They will need the password and network name to connect.
Reading list feature: Snap view now supports up to three apps: You can now place up to three modern apps side-by-side on each screen.
All apps on Start: Simply click the Down arrow button or swipe up from the bottom of the screen to see all installed apps.
Highlights newly installed apps: The Start screen now highlights newly installed apps to help you easily access them.New PC Settings: The PC Settings or the modern Control Panel has been updated with plenty of new settings.Most of the settings that are present under the old Control Panel are now available in PC Settings as well.Native support for touchpad gestures: Unlike Windows 8, Windows 8.1 doesn’t require you install drivers to enable supported touchpad gestures.All touchpad gestures are supported out of the box.Microsoft has finally released Windows 8.1 to the public and it’s available as a free update to all existing Windows 8 users.If you have upgraded to Windows 8.1 or planning to upgrade to Windows 8.1 in near feature, check out the 50 best features introduced with Windows 8.1.You need to sign-in with your Microsoft account to use this feature.Updated Windows Store: The updated Windows Store now has close to 1,00,000 apps.The Start button: Microsoft has restored the Start button in Windows 8 to help users quickly switch to the Start screen.Right-click on the Start button to see Power User Menu (Windows X menu) containing shut down, restart and a couple of other options.