Universal WIndows App Visual Studio Enterprise 2015

When creating a Blank Universal Windows App, I am getting the following errors:

The type 'IAsyncAction' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.    
The type 'IAsyncActionWithProgress<>' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.  
The type 'IAsyncOperation<>' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.   
The type 'IAsyncOperationWithProgress<,>' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.  

Any help appreciated. Thanks


ANSWERS:


Your Visual Studio 2015 setup failed at some point. This error should never happen.

Perform a clean install (unsinstall/re-install).

Here are some references

How to resolve " 'IAsyncActionWithProgress<>' is defined in an assembly that is not referenced" in Windows UAP app



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