Suddenly I managed to install FW 1.05 without the frozen window problem. But sometimes at start up it shows the ERROR screen bu if I push EXIT it starts and works.
The BUZZ is still there, on clean notes, with no noise gate, no stomps, no stacks, no effects and no loops and it is not a sense issue.
It is present with different guitars (also my strat with Kinmans), in speakers as well as in my headphones. I have no dimmers connected to my lights.
It is not a string rattle problem.
I will try to move my Kemper to another room and AC outlet but I doubt that it will solve the buzz issue.
I have listened to SUCKAMCs sound files and yes it is similar to the buzz in my KPA
Mike