Windows PV Drivers/Building
First of all, you have to get the driver source.
Then you will need a device driver development environment. You can use a Windows 8 or 8.1 WDK, which will involve installing either Visual Studio 2012 or 2013 respectively. Note that you cannot use Visual Studio 2012 Express edition for building drivers. (You may find it useful to install VirtualCloneDrive as Visual Studio is generally supplied in ISO form).
Install Visual Studio first (you only need install MFC for C++) and then the WDK. Set an environment variable called VS to the base of the Visual Studio Installation (e.g. C:\Program Files\Microsoft Visual Studio 12.0) and a variable called KIT to the base of the WDK (e.g. C:\Program Files\Windows Kits\8.1). Also set an environment variable called SYMBOL_SERVER to point at a location where driver symbols can be stored. This can be local directory e.g. C:\Symbols.
Next you'll need a 3.x version of Python (which you can get from http://www.python.org). Make sure python.exe is somewhere on your default path.
Building a driver package
Now fire up a Command Prompt and navigate to the base of your git repository. At the prompt type:
This will create a debug build of the driver. To create a non-debug build type:
Note that Static Driver Verifier is run by default as part of the build process. This can be very time consuming. If you don't want to run the verifier then you can add the 'nosdv' keyword to the end of your command e.g.:
build.py free nosdv