I have a solution with multiple projects including one with unit tests. If I start debugging the unit tests in the solution (Test -> Debug -> All test in a solution), the starting of the test first fails with an error "Unable to start program 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\QTAgent32.exe'". The second time I start the debugging, it works. Third time fails again, fourth time works, etc. etc. This also results in multiple (dozens at lest) QTAgent32.exe processes running.