In the Windows Driver Kit (WDK) 8, we’ve separated distribution of the Windows Driver Frameworks (WDF) co-installers from the kit. You need to download the WDF co-installers separately from the WDK. Additional redistributable content can be found in the WDK.
For WDK technical support: Get Help with Driver Development and the Windows Driver Kit (WDK).
Released August 17, 2012
About This Download
This redistributable package contains the Windows Driver Frameworks (WDF) version 1.11 co-installers for both User-Mode Driver Framework (UMDF) and Kernel-Mode Driver Framework (KMDF); update packages of the 1.11 bits with the .msu file extension if you want to build your own stand-alone installer; and earlier versions of the co-installers in case you need to use them in your packages.
Note: If you downloaded the WDF co-installers before August 17, 2012, you should update them with these latest versions.