Great news for all the mobile developers out there that have been waiting patiently, and even for those that haven’t been so patient. At the Build 2012 conference today, Microsoft has officially released the software development kit (SDK) for Windows Phone 8. The SDK provides developers with the tools required to develop apps and games for Windows Phone. This release of the SDK supports building applications for both Windows Phone 8 and Windows Phone 7.5 devices.
System requirements for installing and running the SDK are a little more than some might expect. From what I can gather, this is due to the requirements of the virtual environment that the emulator runs on. You will need to be running Windows 8 64-bit, 4GB of free drive space, 4 GB of RAM, and your processor must support Second Level Address Translation (SLAT).
You can download the SDK directly from Microsoft’s download center website.