Customer sent test project that was created using VS 2010. When you try to run any of the tests in VS 2012, it causes vstest.executionengine.x86.exe to crash. This seems to only happen on Server 2012. You don't run into this problem using Win7, or if you create a new test project in VS 2012 on Server 2012. See the linked video to see what happens. Also attached is the test project.