Problems with preboot authentication

I wanted to use the switch at home as KM switch to switch a USB mouse and keyboard between my PC and a corporate laptop. If the switch is connected to the start of the notebook, the input device after installing the driver are also recognized clean and the switching between the computers works.

On the laptop, however, a hard disk encryption comes with prepoot authentication used, ie before Windows starts, a special OS is once started, which decrypts the hard drive after the correct password input.
And that this has problems with the switch. Not only that connected through the switch input devices are not recognized it, it is also the notebook keyboard and the touchpad blocked, and the switch is connected so that it is not possible to log on to the system. It is therefore only possible to use the system if you always connect the switch only after the machine was started. However, this leads to mind the switch absurdity.

Note: The problem is not only with wireless mouse and keyboard, but also with very simple wired devices.