Windows PV Drivers
The Windows PV Drivers are built individually into a tarball:
xenbus.tar
Windows PV Bus Driver
xeniface.tar
Windows PV Interface
xennet.tar
Windows PV Network Device Driver
xenvbd.tar
Windows PV Storage Host Adapter Driver
xenvif.tar
Windows PV Network Class Driver
To install a driver on your target system, unpack the tarball, then navigate to either the x86 or x64 subdirectory (whichever is appropriate), and execute the copy of dpinst.exe you find there with Administrator privilege. For more information read the installation instructions.