TMG 2010 – Error “setup failed while registering Forefront TMG managed performance monitor” prompted while installing or repairing the TMG installation

It can happen while installing Forefront TMG 2010 or during a repair that we hit the following error: To this error is also normally linked to the ISA managed control service not starting correctly and errors as the following in the application event viewer: On the other hand it is also possible to hit the…