Have you tried checking the Windows 10 product key Reddit? That might help.
You can also double-check all the BIOS settings, like boot order and secure boot.
It’s also a good idea to use a different USB port in case it’s a hardware issue. If all else fails, consider reaching out to Lenovo support for further assistance. They’ll be able to give you specific recommendations based on your machine.
Keep us posted, and we’ll see what we can do to help!