The issue is reported here https://forums.virtualbox.org/viewtopic.php?f=6&t=83507
Occasionally the VBoxClient eats 100% CPU forever - which affects greatly also the host performance - and the only way to stop it is to shut down the VM.
I have: disabled drag-and-drop, disabled shared folder and simply "kill -9" the process - this seems to cause no side effects.
Occasionally the VBoxClient eats 100% CPU forever - which affects greatly also the host performance - and the only way to stop it is to shut down the VM.
I have: disabled drag-and-drop, disabled shared folder and simply "kill -9" the process - this seems to cause no side effects.