I have narrowed the issue down to one update. I used system recovery to return my system to the pre-update state. Then I installed all updates one at a time, rebooted and checked the Matlab CPU load. Turns out the update for the integrated Intel graphics causes this slow down. Apparently it doesn't go together well with Matlab 2014b and higher. I heard there was a graphics engine update. That might be the explanation for this behavior.
The name of the conflicting update is
Intel Corporation - Graphics Adapter WDDM1.1, Graphics Adapter WDDM1.2, Graphics Adapter WDDM1.3 - Intel® HD Grpahics 5500
Release Date 02. June 2016, size 86.4 MB
I have restored the system to a point before the installation of this update, but I'd like to update my graphics drivers without having to worry about these conflicts.
So far only MATLAB has started to trigger a lot of CPU load after the update. All other programs only use high percentages of CPU time if Matlab is running. Closing Matlab will result in all other processes to stop using excessive CPU time in idle.
CPU load before update with Matlab 2015b running:
CPU load after update with Matlab 2015b running:
CPU load after update and after closing Matlab 2015b:
This current fix is not a solution to me. If there is a solution to update my drivers and Matlab not hogging the CPU, please let me know.
Kind regards, Friedrich