Some Windows devices might include a graphics processor that supports DirectX 9. Some games and programs might require DirectX 10 to provide superior performance and graphics.
Some Windows 8.1 features, such as touch and snapping applications side by side, might require advanced or additional hardware.
Windows Media Center is not included in Windows 8.1. A Windows Media Center licence must be purchased separately. DVR functionality might require additional hardware and is not available in all countries. DVD codecs are not included in Windows 8.1. Watching DVDs with Windows 8.1 requires separate playback software.
Some applications sold separately.
Internet access fees or other service charges might apply.
The following features are only available in Windows 8.1 Pro and Windows 8.1 Enterprise:
BitLocker and BitLocker To Go
Remote Desktop Host
Connecting to a network projector
Network location-aware services
For more information about Windows 8.1, see Update to Windows 8.1: FAQ.