Windows 10 Technical Preview requirements
Before we get too involved, it’s worth noting that the Windows 10 Technical Preview is limited to PC and Windows tablets with x86 processors—there’s no version for Windows RT tablets and their ARM processors available, as Windows RT tablets won't be receiving Windows 10. (Sorry, Surface RT owners.) If you’re unsure which version of Windows your tablet is running, right-click on the “This PC” icon in File Explorer and select Properties. Your Windows edition information will be at the top of the window that appears.
Here are Windows 10’s other hardware requirements, which are just as modest as Windows 8.1’s.
Processor : 1GHz or faster with support for PAE, NX, and SSE2
RAM : 1GB (32-bit) or 2GB (64-bit)
Hard disk space : 16GB
Graphics card : Microsoft DirectX 9 graphics device with WDDM driver
Some additional notes: You’ll also need a Microsoft account and Internet access. And if you want to access the Windows Store or use Windows Apps, your monitor’s resolution will need to be at least 1024x768. The Windows 10 Technical Preview is available in English, Chinese Simplified, and Brazilian Portuguese.
Still here? Now head over to preview.windows.com and click the Get Started button. After registering for Windows Insider, you’ll be prompted to download the Windows 10 Technical Preview. Download the appropriate Technical Preview build for your machine—the “This PC” or “My Computer” Properties window can also tell you if you have a 32-bit or 64-bit processor under the “System type” field.
Jot down the product key for the Technical Preview, too, though I didn't need to use it to install the Technical Preview. Couldn't hurt to have it handy though.
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