So I opened my exported Windows 8 game in Visual Studio. I click run to try and test it, but get these errors: <img src="http://i.imgur.com/pmEbxcg.png" border="0" />
I got this same error not too long ago and I simply fixed it by looking into my exported Windows Phone 8 project file and changing the name of the Construct project. Maybe the name of your project has a character in it that isn't authorized with Visual Studio? Mine had a question mark and it completely messed everything up until I took it out, then it worked just fine.