File 'Windows.props' not found

Question

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

Answer 1

Some basic checks you need to perform to get anywhere close to a resolution.

The Windows.props file is a build file that's used by MSBuild.exe when it builds a Windows Phone app. The normal install path is C:\Program Files (x86)\Windows Phone Kits\8.1\References\CommonConfiguration\Neutral\Windows.props. Use Windows Explorer to check if the file is present.

Then there is a line in the main .targets file that includes it. It tries to locate the file in the $(TargetPlatformWinMDLocation) directory. You can see the value of this macro by increasing the build verbosity. Tools + Options, Projects and Solutions, Build and Run. Change the "MSBuild project build output verbosity" setting to Detailed. Use Build + Rebuild on your project. Scroll back the Output window and locate the lines that resemble this:

1>TargetPlatformSdkMetadataLocation = C:\Program Files (x86)\Windows Phone Kits\8.1\References\CommonConfiguration\Neutral
1>TargetPlatformSdkPath = C:\Program Files (x86)\Windows Phone Kits\8.1\
1>TargetPlatformSdkRootOverride = 
1>TargetPlatformVersion = 8.1
1>TargetPlatformWinMDLocation = C:\Program Files (x86)\Windows Phone Kits\8.1\References\CommonConfiguration\Neutral

Tell us if you see anything different.

This path is read from the registry. Startup Regedit.exe and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\WindowsPhone\v8.1\Install Path as well as HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\WindowsPhoneApp\v8.1\Install Path.
Verify that you see a value listed in those keys with the name "Install Path" and that it contains the value "C:\Program Files (x86)\Microsoft SDKs\WindowsPhoneApp\v8.1\".