[avl999]

System76: https://system76.com/laptops

I believe there are also Dells that you can buy that don't come with Windows preinstalled.

[okaleniuk]

I have a Dell that came with Ubuntu 16.04 preinstalled. Somehow, it still doesn't play well with 18.04. Tried to upgrade, ended up with reinstalling the 16.04 back from scratch.