Windows 8 Activation using Desktop Control Panel If your PC is currently running Windows 7 or Windows 8 you can check to see if it meets the requirements by running the Upgrade Assistant.

InstantGo works only with computers designed for Connected Standby.

To install a 64-bit OS on a 64-bit PC, your processor needs to support CMPXCHG16b, PrefetchW, and LAHF/SAHF.

Free internet TV content varies by geography, some content might require additional fees (Windows 8.1 Pro Pack and Windows 8.1 Media Center Pack only).

Wi-Fi Direct Printing requires a Wi-Fi adapter that supports Wi-Fi Direct and a device that supports Wi-Fi Direct Printing.

Miracast requires a display adapter which supports Windows Display Driver Model (WDDM) 1.3, and a Wi-Fi adapter that supports Wi-Fi Direct.

A TV tuner is required to play and record live TV in Windows Media Center (Windows 8.1 Pro Pack and Windows 8.1 Media Center Pack only).

Client Hyper-V requires a 64-bit system with second level address translation (SLAT) capabilities and additional 2 GB of RAM (Windows 8.1 Pro only).

BitLocker requires either Trusted Platform Module (TPM) 1.2 or a USB flash drive (Windows 8.1 Pro only).

BitLocker To Go requires a USB flash drive (Windows 8.1 Pro only).

Windows Media Center license sold separately.

Watching DVDs requires separate playback software.

Some games and programs might require a graphics card compatible with DirectX 10 or higher for optimal performance.

Secure boot requires firmware that supports UEFI v2.3.1 Errata B and has the Microsoft Windows Certification Authority in the UEFI signature database.

Microsoft account required for some features.

To access the Windows Store and to download, run, and snap apps, you need an active Internet connection and a screen resolution of at least 1024 x 768.

To use touch, you need a tablet or a monitor that supports multitouch.

Additional requirements to use certain features:

Windows 8 enterprise activation key