I have install Windows 8.1 and after that I install Visual Studio Express 2013, which includes Update 2 RC.So when I run any application then it gives me the error
Extracts from msdn discussion:
check for the existence of a SYSTEM level environment variable called windowsSDKDir and try removing it.
For this Follow these steps:
Press Windows Key + X and select System.
In the System dialog click on "Advanced system settings" then click "Environment Variables" on the advanced tab.
Then look for the environment variable I mentioned
try removing it
If this not works for you ,you must re-install, Windows Software Development Kit (SDK) for Windows 8.1 this must solve your problem.