Description of problem: While the guest window (remote-viewer) has focus (doesn't matter if mousepointer is catched or not), at least one USB-port (mouse from the KVM-switch) will get locked after switching between computers with a hardware KVM-switch. Keyboard remains accessible within the VM, but not so the mouse. If the VM is being shutdown and viewer window gets closed, one more switching will make the mouse work again. This was not an issue in Version 3.1. Switching back several times while the guest window has focus, will lock ALL USB-ports (controller?) within the originating system (you won't hear Windows sounds anymore for (re-)attaching devices, whatever port you will use)! Version-Release number of selected component (if applicable): v5.0-256 (x64), On windows 10 Pro 64bit How reproducible: Every time Steps to Reproduce: 1. Connect to guest using remote-viewer 2. Focus guest window 3. Switching forth and back computers with a USB-KVM-Switch Actual results: The mouse remains not usable anymore after switching the first time. No more USB ports will be accessible after switching at least one or two more times. Expected results: If Windows looses connection to (USB) mouse/keyboard, the remote-viewer / guest should get noticed about this to detach mouse/keyboard properly? USB-ports should work in any way. Additional info: