First of all thank you for accepting my problem.
The model is an AMILO Xi 1526 from a friend who wants to give the laptop a meaning. The device has an Intel Core 2 Duo (T5600) and a dedicated Nvidia graphics card that I can not read from the bios.
The BIOS is very simple. I have enabled and disabled the Execute Disable Bit function and tried it both times without success. All energy saving features are disabled. The boot order is limited to USB devices and I have already tried it via the boot menu. Other settings do not exist.
I tested the hardware occasionally with the UBCD and under Windows as at work. Furthermore, I checked the USB ports on the technical level and found no errors.
I copied the ISO of Manjaro under Windows 10 with the Win32DiskImager on the USB data carrier.