Win8.1 hardware requirements

Windows 8.1 works great on the same hardware that supports Windows 8: · Processor: 1 GHz or faster · Memory: 1 GB (32 bit) or 2 GB (64 bit) · Available hard disk space: 16 GB ( 32-bit) or 20 GB (64-bit) · Graphics: Microsoft DirectX 9 graphics device warning with WDDM driver · In order to use Windows 8.1 Preview, you must log in to your computer with a Microsoft account. The option to create a local account will be available in the final release of Windows 8.1. To use certain features, you also need to meet the following additional requirements: · For 64-bit installations of Windows 8.1 Preview, your CPU must also support CMPXCHG16b, PrefetchW, and LAHF/SAHF. · To use touch, you need a multi-touch tablet or monitor. · To access the Windows Store and download and run apps, you need a valid Internet connection, at least 1024 x 768 screen resolution, and a Microsoft account. · Internet access (may generate ISP fees).

Windows will check your system for compliance before you update to ensure your system supports Windows 8.1 Preview.