System requirements Basically, if your PC can run Windows 8.1, you’re good to go. If you're not sure, don't worry—Windows will check your system to make sure it can install the preview. Processor: 1 gigahertz (GHz) or faster RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit) Free hard disk space: 16 GB Graphics card: Microsoft DirectX 9 graphics device with WDDM driver A Microsoft account and Internet access Important notes Some PC processors and hardware configurations aren’t supported by Technical Preview, including a small number of older, 64-bit CPUs, and some 32 GB and all 16 GB devices running a compressed operating system. To access the Windows Store and to download and run apps, you need an Internet connection, a screen resolution of at least 1024 x 768, and a Microsoft account. The Windows Store in Technical Preview will have many (but not all) Windows 8.1 apps available. (Apps for Windows 10 Technical Preview will not be available for PCs r...