@antouank said in USB installer won't boot:

docker and haskell use a lot of size. Maybe steam also.

that’s true ;)

Yes, when I got the laptop, I formatted it and got antergos. Then I added win10.

so then it is kind of o.k. but better install windows first and then linux… for win updates and consistency…

You need only a win10 install dvd/stick to recover win efi partition… https://www.microsoft.com/en-us/software-download/windows10ISO