@spiegelmama not sure on that one yet, but while you are in the bios disable fastboot just in case. I assume Windows was or is still also installed on there? Apparently, there are instances where fastboot doesn't completely shut down Windows, and it still has control of the networking.

@spiegelmama curious, do you know the model number of the laptop?

@spiegelmama that does narrow it does a lot. Don't know much about the Alienware line, but on quick glance the possible models configs they all seem to be essentially identical apart from the graphics card. That will simplify any additional research