Problem with USB Keyboard

Hello from Germany!
I try to use GParted Live on my "Acer All-in-One U27". (Intel Core i7 - 8550U)
My Problem is:
Before i can choose a language, i have to choose "Don't touch the keymap".
But in this window my Keyboard doesn't run. No reaction.
I also tried to install "Linux Live USB creator" - but it also doesn't work.

Has anybody an idea, what can i do?
It's really urgent, because the computer is needed by my company!
Greetz!
Chris