Visual Studio 2015 diagnostic tools no longer working

Question

I have Visual Studio 2015 Community Edition Update 3 running on Windows 7 SP1 64 bit, which I use to develop C# applications.

I love the diagnostic tools during debu

Answer 1

I had som issues with that a while ago.

1) Check Tools>Options>Debugging>General>Enable Diagnostic Tools while debugging

2) Check Tools>Options>Intellitrace>Enable intellitrace

Answer 2

I had already another visual studio instance running with diagnostic one. That was the issue for me.