You are correct and now you know why one cannot purchase an OEM machine without a copy of Windows installed on it for the most part.
Give it a try.
Call HP, tell them you want to purchase the very best note book computer money can buy, you have a good credit card in hand but the only condition you require is that you don't want Windows pre-installed.
See how far you get. LOL LOL
I do it sometimes just to have a bit of fun !!!!
Rick P. ♥ :)