I tried to setup VS2015 and WDK10 on our 2012R2 Build server.
I have a driver project which compiles well on a Win10/VS2015/WDK10.
On the 2012R2 platform, the project does not build. Relevant log line:
1>C:\Program Files (x86)\Windows Kits\10\build\WindowsDriver.common.targets(180,5): error : An SDK corresponding to WDK version '8.1' was not found. Please install the SDK before building.
Interstingly, some project settings appear changed between 2012R2 and Win10:
"General/Targetplatform" is "Windows" instead of "Windows10"
"General/target platform version" is tied to "8.1", while on Windows10 several types can be choosen.
On the other hand, "Driver Settings" are the same on 2012r2 and Win10:
"Target OS Version" is "Windows7, "Target platform" is "Desktop"
Maybe here is the problem:
I've read the requirement "install all other VS versions before installing VS2015". But this would mean to setup an separate build server just for the driver, so I ignored this advice.
Thanks for reading
Joerg Hoppe, PEAK System Technik
Some screen shots (sorry, german version)
On 2012R2:

On the working Win10 installation:
