We could ask vendors about machines without windows pre-installed
I have seen in my contry (Romania) that almost all laptops (90%)
are with windows home/pro already on them .
There are some vendors that give you choice :Acer and Siemens sell some models
One intersting article related to this bug
"Early results of the (Dutch) Windows refund survey"
"Sometimes as a Linux user, you wish you could buy any computer with Linux preinstalled, or if that's not possible, just without an operating system, but that's not the reality. If that isn't possible, is it possible to buy any computer with Windows pre-installed, and then, return the unused Windows, and ask a refund for it? That's a question many non-Windows users ask themselves. The answer however, isn't clear to consumers. There's only one way to find out: ask your hardware manufacturer. Or do they neither know the answer? Time to find out."