Hi TrondS,
Check parameters in Integrated Peripherals section in Bios:
USB Controllers
Enables or disables the integrated USB controller. (Default: Enabled)
Disabled will turn off all of the USB functionalities below. USB Legacy Function
Allows USB keyboard to be used in MS-DOS. (Default: Enabled) USB Storage Function
Determines whether to detect USB storage devices, including USB flash drives and USB hard drives during the POST. (Default: Enabled)
Choose Enabled.
Edit01 : If you use a Wireless keyboard or mouse , check a batterie force. Maybe is not powerfull.
Gloup_Gloup