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System requirements for Windows 8.1

If you want to run Windows 8.1 on your PC, here’s what it takes:

Processor: 1 gigahertz (GHz) or faster with support for PAE, NX, and SSE2 (more info)

RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)

Hard disk space: 16 GB (32-bit) or 20 GB (64-bit)

Graphics card: Microsoft DirectX 9 graphics device with WDDM driver

Additional requirements to use certain features:

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

• 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 × 768

• Microsoft account required for some features

• Internet access (ISP fees might apply)

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

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

• Watching DVDs requires separate playback software

• Windows Media Center license sold separately

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

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

• 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)

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

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

• 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)

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

• InstantGo works only with computers designed for Connected Standby