I'd check that again if I were you.

Until a few years ago this was the situation in Germany too, but then the sellers had the glorious idea that they're not selling a laptop with an OS but an "integrated device". According to that point of view the laptop and the OS form a common entity that cannot be taken apart without destroying the product. In this product there is no laptop that's bundled with an OS (which would be forbidden) because there is no laptop to begin with.
As a result you can still refuse to accept the Windows EULA, ask for a refund and the seller will ask you to return the product to grant you the refund. The problem is, the product is the "integrated device" and not some "OS part" so you'll have to return the laptop too.

As you'll see here [1], the FSFE has no reports of successful returns in Germany after 2008. That of course doesn't mean there were none, but given the nature of the topic I'd call that a pretty strong indication.


[1] https://wiki.fsfe.org/WindowsTaxRefund/Germany